Bro I can do like three of five in a row , once I needo do like 20 I just do 3x7
Pretty nice! It's good that you're starting, it's the hardest part lol.
Try doing 15 push ups in a row a day, that's how I started, if you can't just 10.
Then do 2 series of 15 the next week. Or 2 of 10.
Don't give up