How to make puppy pee outside??

My puppy is 5 months and he still insists on peeing inside. I take him out every 1 to 2 hours and he rarely pees outside. I take him out maybe 7 or 8 times a day and out of all of those times, he will pee twice. Three times if im lucky. I’d be even luckier if he pooped at any time other than his first morning walk. There would be times where we take extra long walks, about 30 minutes to an hour and he didn’t even bother using the bathroom and let it all out when we got home.

I make sure to praise him and give him treats when he does it. And it’s frustrating to constantly clean up after him. Im worried my mom will get frustrated enough and demand him to be rehomed because of it. I can already tell she’s getting fed up with his accidents.