I started with those poverty wizards, then Cactus PT-04, but the big improvement for me were YongNuo 560IV and their wireless controller.
Did not find a pressing need to move on from them though the market has improved even more with Godox transmitters and Flash (which are RF wireless, PTTL and HSS)
I can't even be bothered juggling with the inconsistencies of PTTL nor the antiquated 'wireless' on the Pentax flashes which are IR based, and left them unused.
On the low budget side, just get x2 YN560IV an a transmitter. The work on manual flash power, but its really easy to learn them and very consistent.
Each YN560IV flash has a built in wireless Rx and Tx. (so no need for external receivers)
The dedicated transmitter allows even more controls to group the flashes and set the power, zoom, spread of the flashes.
For more up to date stuff, it will be Godox (still inexpensive ). But I am not familiar with their models to comment further. I do have friends that have moved on to them with very good satisfaction.
Other stuff will be light modifier (IMHO, a bounce umbrella will be a good start, then move on from there when you learn more and know what else you want)
Key thing will be learning the many tutorials on Youtube.
Good luck.
Last edited by pinholecam; 02-27-2021 at 12:54 AM.