Lots of states are turning hostile towards metered solar, I have no doubt Washington will eventually join them so it might not be long-term a good idea. As for resources diysolarforum.com has a ton as does www.youtube.com/
As for equipment i can’t recommend signature solar enough. I’ve had plenty of problems with the FedEx freight shipping but they’ve always been good about making sure everything is taken care of if there’s any damage without much fuss (always take pictures of even the smallest box damage on delivery)
For example with a goal of about 20k spent This bundle gets you 12Kw of inverter output and 30Kwh of batteries for 11k. Then just grab two Of these solar panel pallets for 28Kw of panels.
Now ofc in summer you will never use that much BUT you should be sizing your array to account for the winter months rather than solar. If you indeed want to go grid tie you could get one of their bundles with the larger 12k single unit as I’m pretty it can backfeed