Need some advice

I've never been the healthiest kid (microwave/takeaway meals lack of exercise) but I've recently had someone in my life whose giving me to motivation to follow and get healthier. It's helped that I've moved out and now am in uni halls. It's a flat so I've tried not to be to loud and I do about 20min of semi- active workout being: 10 Squats 10 lunges on each leg 5 weight lifts (using my laundry basket and random items) 5 half push ups (I don't have the strength to do a proper one without faceplanting the floor TwT) 10 windmills on each arm (spinning my arms around I think that's what it's called) Followed by some shadow boxing I rember back from when I was young and did karate classes. 20 jabs on each arm 10 blocks on each arm 10 low kicks 10 uppercuts 10 high kicks 10 knees Then I do a 15 second plank.

I get through like 4 of these in the 20min I do them in and it feels like hell. I do t have any expirence if this is good or not or if I'm not doing enough so any advice would be nice