Look into bodyweight fitness stuff. Pushups, pullups, squats.
You don't need fancy equipment, though a few minor things (can be much less than $100) like a pullup bar add a lot of value.
You can definitely do it in your home though the backyard or park might be nicer.
And you can tailor your approach to your fitness level: if you can't do traditional pushups, you do pushups on your knees. If normal pushups are too easy, you can do decline pushups. There are different levels of exercises for every part of your body.
As a bonus, you get to move around a bit which is what you say you want to do a bit more of.
You don't need fancy equipment, though a few minor things (can be much less than $100) like a pullup bar add a lot of value.
You can definitely do it in your home though the backyard or park might be nicer.
And you can tailor your approach to your fitness level: if you can't do traditional pushups, you do pushups on your knees. If normal pushups are too easy, you can do decline pushups. There are different levels of exercises for every part of your body.
As a bonus, you get to move around a bit which is what you say you want to do a bit more of.