I've been buying this one and it's working for me. I really don't know how to pick solder but this one is fine 🤷. I've got the cheapo plastic sucker and it works for me but it takes a while to get the hang of.

https://www.amazon.com/SONEAK-Solder-Rosin-Electrical-Soldering/dp/B084RZF23H?pd_rd_w=3R0dF&pf_rd_p=85da05e5-c593-4314-b5c1-e397081af052&pf_rd_r=4SCDM9XRANDVEE9JXZBN&pd_rd_r=465e4dc5-3d0f-475e-af1c-c2124148317e&pd_rd_wg=jynHv&pd_rd_i=B084RZF23H&psc=1&ref_=pd_bap_m_rp_14_sc