new linux thinkpad advice???

   technically not "new" but it's pretty new to me. so i was browsing around in our dusty ass basement (where my stepdad hoards all his old crap) and found this thinkpad in actually nice condition??? it needed a new drive ofc - the one in it corrupted BUT after a 1tb ssd and a xubuntu iso this thing is amazing. i mean seriously - it feels faster than my school-provided modern laptop while somehow having worse technical specs than it. typing this on the 'pad running xubuntu rn feels great - i understand why this became a trend of sorts. 

    i've got discord, brave, steam (with proton enabled) and a couple games downloaded - you linux guys know anything else i should download / install beyond what came with it or general tips? im new to this terminal life - and mostly just using this laptop for schoolwork (my school uses office 365 suite if that's important) and some light gaming on steam