eh. 10 isn't so bad. I've been running it on most of my computers for a while now. It's a much shorter learning curve than 8 was..
When in doubt, right-click and select all the "pin to x" options. Then your everything will be everywhere.
As for the logging in, the forum is a bit particular. Enter the username, password, check that box, then *click* the log in button.
checking the box, entering username and password and hitting "enter," won't save it for some reason.
Also, if you haven't already done it, install firefox, then install adblock plus, and "privacy badger." they're pretty much the best tools ever.
https://adblockplus.org/
https://www.eff.org/privacybadger