If you have a pair of wheels to do, I can recommend the Hope OEM kit:
https://www.winstanleysbikes.co.uk/product/37625/Hope_No_Tubes_Tubeless_Kit
Valves, tape and fluid for a couple of wheels for £18. Stans valves are excellent, as is their fluid. As others have stated, the tape can probably be obtained cheaper elsewhere, but if want a starter kit for your first wheel, you can’t go wrong here.
Getting the tape on takes a bit of practice, but the trick is to get it as tight as you possibly can – I normally put the wheel, vertically on the ground (on a blanket or something) so I can pull the tape as hard as I can. Done correctly, the tape should have zero creases and be as tight as a drumskin. Good video on the Stans website.