You’ve already been given some amazing responses to your questions, so I just want to pop in my two cents
You asked if you could still be a witch even if you can’t physically perform spellwork. The short answer is yes, of course!
There are several different models of belief when it comes to witchcraft. No matter which one you fall into, there are no physical requirements for spell-casting unless you belong to a tradition that requires it – many people do, such as Initiatory Wicca, where different tools and implements hold very specific meanings.
The models of belief in witchcraft are broken down very well in Ariana Carrasca’s book Spellcraft and Spellwork. In it, she says the following:
The spirit model…posits that there is an Otherworld beyond our physical plan that is inhabited with all sorts of different types of autonomous spiritual entities. Such spirits can include angels, demons, deities, land spirits, plant spirits, the fair folk, etc. When we perform magic through the spirit model, we understand that the works are carried out and function through the help of entities enlisted in the magical process. Behind the scenes these spirits are able to control, manipulate and influence situations in a spiritual plane we don’t readily have access to, so that they align and fulfill the magical goal.
The next most common model of magic is referred to as the energy model. The underline premise of this model is that reality is comprised of energy. Energy is everywhere and every action or phenomenon in the world is a sequence of energetic movements. As magical practitioners, we employ techniques to manipulate and move that energy towards a desired goal and that serves the fundamental process for how magical workings, such as spells, work.
The psychological model is a further semi-popular model in today’s witchcraft and magical communities. Sigmund Freud’s psychodynamic theories revolutionized psychology and has since influenced many schools of thought on how the mind works and explanations for human behavior. The psychological approach to magic is underlined by this, and posits that the unconscious can be tapped into in order to affect change, through subliminal symbolism and altered states of consciousness. In this case, intentional magical action is training your unconcscious mind to influence changes in your life.
If you notice, none of these models say anything about needing any tools, implements, ingredients, or physical items for them to work. It is also possible to fall into more than category at once depending on your beliefs.
For me, at its core, witchcraft works through both spirits and energy. I can sit quietly in my room and travel to the Otherworld to enact the help of a spirit familiar or other entity. This is done through trance, meditation, astral travel, and spirit flight. None of these methods require any objects, tools, or rituals. The spirit you work with may require an offering from you, and that may turn out to be an item, but it doesn’t have to be.
In the energy model, I can clean my house while playing music to raise positive energy. Then, I can open the doors and windows to allow the positive energy I have raised to push throughout the room and house, leaving no room for negativity to stay. This doesn’t require anything special, either. Adding in a broom can help, but it can just be a regular broom that you use to clean your house.
The overall point I’m trying to make here is that you don’t need anything special to practice witchcraft. Tools such as candles, herbs, plants, books, etc. are just tools to help connect you to what you’re doing. Granted, it is often easier when you’re a beginner to use tools, but it is not impossible to work without them.
My suggestion to you would be to work with your energy. Learn to sense your own energy and the energies of others. Work on grounding and centering techniques, meditation to find your focus, and intuition to hone your senses. You will slowly start to learn the difference between your energy and Earth’s energy, and the energy that is naturally flowing in the air around us. You can then manipulate this energy, give it purpose, and release it back into the world to do what you need it to do. None of that requires any special tools, just lots of practice and the ability to be humbled when it doesn’t work, because it won’t always work, nor will you probably get it right the first few times you try.