It really depends on the field of open source software you’re in. Custom roms and modding of devices in general is always pretty community dependent. The reason for that is the variety of hardware additional to the missing specification and sometimes missing standardisation from the vendors. It’s one of the harder fields to get your hands on if you want things to just-work. The software often gives you the ability to configure the things vendors hide but on the other hand also expects you to do it manually. But don’t give up, most of the times it gets better after you passed the first few hurdles and got a little more knowledge in the field you’re in.