I second this solder. Great stuff. I think mine is in that diameter too. Pretty handy diameter. I do some smd work sometimes and thinner is better.
No advice on tips other than to get a variety of sizes/shapes and use them. You will probably gravitate to a few of them for most of your work, but none will probably go to waste if you do a good bit of soldering.
My basic all around Hakko tip is the T18-D24 shape-2.4D came stock on my Hakko, my favorite! But I also have the T18-D16 shape 1. 6D which is smaller and then the bigger D32 shape-3. 2D and bigger for like deep soldering, example a TK61.
Solder, my favorite is STANNOL 0.7mm HS10 solder or Kester’s great stuff!