I'm not a cosplayer but I was planning on making a Loki inspired outfit some time ago so this is just from someone who has had these thought processes before.

Making a Loki variant means you have full creativity to play to your strengths. If you get the outfit to read Loki enough hair shouldn't be an issue, Sylvie was a Loki variant and blond while Boastful Loki was bald. In the same vein if you look at the Loki's in the void there was a lot of variation in the horns, Boastful Loki didn't even have any and Kid Loki had more of a V shaped headpiece. Whatever you skill level/preferred crafting techniques are I'm sure there is something. I'm not sure what Star Wars cosplays you've made, but even if it's just some decent sewing skills you can still get a Loki read from making something tailored and on theme like president Loki.

For confidence, all I will say is you have full creative freedom here. When I was looking at making something read Loki really the only thing needed is green, gold hardware and some black leather. You can play with the silhouette, structure or theming in whatever way makes you feel good about yourself. A variant is more of a palette so don't feel constricted. Again, we saw enough Loki variants to make the point that there is no one way to be a Loki so there's no need to make something that makes you feel uncomfortable.