I personally believe to start it out slow and then move up from that, the first day you could do a few jumping jacks and maybe a lap of your block, then just work yourself up from there
Don’t immediately give up because you’re tired. You have to keep going, keep pushing. It doesn’t have to be a chore, exercise can be fun!
Not to feel scared that people can see you working out, be happy thatr they are taking your advise and exersizing like they should!!