You would either need to do laser then electrolysis or just go straight for electrolysis, it does depend on your hair colour. I'm pale and had mostly dark hair so I was told to go for laser first, but despite picking a very posh city centre clinic who were using one or the best machines, 6 laser sessions had no long term impact for me, it was only a temporary reduction. I do think that's just my experience though because a lot of girls here have had good success with it.
When it comes to electrolysis there is an institute/association in the uk that all the best practitioners are a member of, so it might be worth seeing if there's anything similar wherever you are. Make sure you pick someone nice, because you'll be spending a lot of time with them! The lady who does mine works at her home and was recommended to me by other trans women. There are a few different types of electrolysis, galvanic, thermolysis or blend (which is a blend of the two). From my understanding blend is effective and less painful but slow, whereas galvanic, which is what I have, is fast, more like a little zap, but doesn't have quite as high a kill rate. Might be muddled on that though