Hey and welcome to YT
I agree with the others, this baby is too young to hold it for long. I too tried crate training but it didnt work for us- he did his business in there. But luckly im home all day with him. Ofcourse you have to work, so you've come to the right place to find great advise. He's too young for daycare and i know not everyone has axcess to a pet sitter.
Anyway, I agree that a play pen might be the best solution for you. I was going to purchase one too before i quit my job. 1. they have a limited place to potty 2. its safer, they're confined.
Don't feel bad, we all learn as we go and I'm sure your doin the best for your little guy. Post pics soon