Hey don't give up! I use Home Designer Pro 2021 professionally, I'm using it for a new house for a client! I am educated but not a registered architect, I have 35 years drawing plans in CA. The engineer always signed off on the structural liability, if there was no engineer required, the homeowner or builder could always sign. There was never a problem. I have a colleague I collaborate with occasionally when she has a design issue on a roof or something and I just export my plan from Pro (in her format) & it's in her computer drawing program to manipulate, saving her time & money!