I want to join the caliversity training sessions but my friends cant join me, are the people there friendly? I feel abit awkward going on my own

Hi daemon, how do u warm up for ur calisthenics routine, cuz for me after a full day of staying at home, i feel weak and cant rep out half of my max reps. Ive been trying to jog to get the blood flowing but even that doesnt work sometimes, pls help🙏🏻🙏🏻

How do u bulk up more, im skinny and looking to build muscle, Is it just as simple as eating 4 meals a day? Cuz on a day to day basis, I usually just eat caifan for mostly breakfast, lunch, dinner(for non sg its rice with egg, meat and veggies). Do I have to eat in between my meals also, and if so what type of foods should I buy?

How do you train legs with just calisthenics, and no gym? Or do you need the gym to train legs?

I noticed that whenever I try to do arched pull ups using my resistance band, my form keeps changing to a hollow body pull up, I just can't do arched pull ups with a resistance band, and without it I cant do enough pull ups to feel it in my back, can anyone help? I watched so many vids about the arched pull up form but I still can't seem to get the form down