As for not being able to exercise or activities, you need to find those things that made it joyous for you. What worked for me, was simply finding those little things I am grateful for, being happy about things around me. Could be as simple as being happy about having a balcony with a view where you can sip you morning coffee in peace and listen to music.
I started aligning myself to what I wanted, I gym because I love this version of myself who is fit and ready to tackle anything. The idea is to find those little triggers that motivate you and help you with a positive feeding loop internally.
My workouts helped me to be fit, the fitness helped me to be sharper mentally, the sharpness helped me to pick tasks meaningfully and so on. I always look at how I connect these dots as a motivator to bring myself to be consistent and it helps.
Beyond that, maybe explore different things you otherwise wouldn't. Push yourself like how you would for you job, like go for a pizza making class, explore the local market. Anything that gives you a chance to build your own story in your mind and then connect with people beyond the norms. An open perspective is sometimes all it needs to break the shell and stop oneself from constantly putting a blocker.
Hope this helps you man :) Not as concise or structured as I would've wanted it to be, but the idea was to simply share your feelings and let you know it's okay :) Just keep at it one day at time and practice more self love than anything else in this world