Last time I changed my oil I did a lot of research on oil filters and oil. Fram was universally rated one of the worst. It uses cardboard for its internal support structures, and has less filter material than other filters. The Walmart equivalent filter is actually better.
Purolator filters cost slightly more, but they support the filter material with metal instead of cardboard, and they have a lot more filter material than others (esp. Fram). The price difference wasn’t that great though, so you really don’t need to sweat price.
As for crush washers, you can pick them up at a car parts store, where you also get the filters and oil (although I prefer to buy my Rotella-T from the local farm supply, where it’s slightly cheaper). You need to know the diameter of the nut, then ask for it at the counter.
A torque wrench is also a lot cheaper than you would think. If you were a professional mechanic you’d pay a lot of money for a really good one. If you change the oil on your bike once or twice a season, you want a $15 wrench from Harbor Freight, and an inexpensive metric socket set. Make sure you match the wrench’s size to the attachment size of the sockets. 3/8″ and 1/2″ are the most common sizes. Think I went with 1/2″ because it’s easier to get the large sockets needed to swap out wheels that fit a 1/2″ wrench.
In general, the more you can do on your bike the better. Motorcycle mechanics charge way more for their work than car mechanics do, and motorcycles are a lot easier to work on than cars. Tires are the one area when the tool investment to mount and dismount the tire from the rim will take a long time to pay off, but even then, if you’re going to make riding a long-term thing, it makes a lot of sense to buy the tools and learn how to do it yourself.