That is amazing progress! Always try to remember it's a journey, not a destination, and you will have ups and downs along the way. For instance, I'm just getting back to serious gym pursuits because in the last year I got a new job with a commute that sucks (everything else is good with it tho) and lost my father, so I stumbled pretty hard on my journey while learning to cope with some major life changes. It can get depressing when you know you can do better but aren't for whatever reason, and you just have to try and remember that you will get there again if you keep at it. Giving up is easy, getting up is a hell of a lot harder.

Your protein intake seems very low to me, I believe the ideal protein intake is about a gram per pound of your goal weight. So, you likely need to at least double your current intake to allow your body to build more muscle.

If you have a blood pressure issue, squats are probably going to be risky, esp the more weight you add as your effort increases. Def talk to your doctor about what you can/should do, and maybe try to mix in other exercises. Weighted lunges are wonderful for you.

There's a 100 push up program you can follow if you want to keep improving there, it was a fun challenge that I did once upon a time, now as long as I can consistently do 30 or so I don't feel like like I've lost it entirely lol. But, make sure you balance it with back work or it can cause issues in your shoulders and back (big/strong pecs pull your back forward and round your posture if you don't have big delts to counter em). Back workouts are probably the hardest to do without some kind of extra equipment like a pull up bar at minimum. Kettle bells can go a long way in making up for a lack of other equipment if you don't have an alternative, a 10 lb and 30 lb bell were the first pieces of equipment I ever bought.