Gizmo start light with the squats & deadlifts until you have your form down. Use a mirror or record yourself to watch your form. You can start with just the bar (45 lbs) and practice form for anday or two. If you find yourself getting sore from that, which is possible, then I’d stick with it for a week or so and increase reps.
Then try 1 plate on each side (135 lbs) for a period of time if you have the strength for it. Don’t sacrifice form. Might only be able to do a couple / few reps with good form at first.
It’s too bad you don’t have 10’s or 25’s to go more incremental on the loading. But I think if you can get to 20+ reps in one set on 135 lbs that’s probably a good sign you could move up to 225 lbs (2 plates on each side)
225 lbs isn’t much by some people’s standards but it’s still plenty to throw your back out or hurt your knees if you have bad form.
Also you are missing any kind of “push” exercise for your triceps / chest / shoulders. You could do overhead press with the barbell (definitely start with just the barbell). If you don’t have ceiling height for that you can do it seated on the floor, called a Z Press, which is one of my favorite exercises!
Edit: my brain skipped over the push ups, so that’s something.
I would also highly recommend learning barbell row too. That would hit the missing spots in your back between the pullups and deadlift.
Please don’t hurt yourself! Happy lifting!