Welcome. I am pretty new myself but I am slowly learning how to navigate the site. Linux is very popular here so if you browse all I’m sure you’ll find some good communities.
If you want something specific go to the search and type c/ With the name of what you want to find. For example c/Linux. You won’t find anything if it isn’t exact but you’ll get some good ones.
I like the washer and not the dryer. Had the set for 4 years. No issues with the washer but the dryer literally leaks lint. The trap doesn’t catch it and it gums up my vents in 2 months.