ERP, socketing, etc are all normal. Obviously you want I'm Helping!, then Sunshower, It's Windy, Reflection, Got You!, Rolly Rolly, Splashy Splashy, Milky Way (pref. mod), Inner Aurora, Swirly and Everybody, Punch are all good skills. Sunshower is healing, windy buffs speed and is good for clearing, reflection is mainly for raids but without it Rosso can just one shot you whenever, got you is pretty bad as a freeze but it gives you almost a full bar of awakening (might want to take it out for raids though so you don't screw up), rolly decreases resistance and is good for clearing, splashy is awkward to aim but your best skill for damage until you get mod milky (got you gathers enemies at the right height to be hit by it), milky way unmod is good clearing, mod is good bossing, both decrease defense and attack, inner aurora gives you sentimental points, swirly just does damage and a bunch of hits, and punch goes straight down, it's good for Sea of Ruin. Hide-and-Seek doesn't do much but of you've lost track of an enemy you can use it to find them.

Things to be careful about: you are fragile. Like I said, Rosso breathes while you're not in reflection and you die. It's also really easy to over commit, especially with sunshower.

Less cautionary tips: Your awakening skill can be used as an active to break thorns. The best place to be during the eyeball (unless you're freezing, which you probably won't be) is the top right of the eye, where you can let off a milky and then deal full damage with splashy before winding up in a good place to dodge the thorns. If you are freezing you can basically use a freeze orb and then got you right away, as if you try to time it any better the freeze will run off.