I finished 3 campaigns already, here is few advices for new/struggling people

(Disclaimer, I'm very experienced poe player and maybe it's little easier for me, but I already helped few people and they are very thankful)

I finished campaign with sorcerer, warrior and ranger. Each time campaign was faster/easier by miles. Last with warrior! took me less than 10h, but ofc I had all of the support games from first lvl and leveling gear every 10 lvls.

Sorcerer It was my first char and it was kind of challenging, but with gear + lvl to skills it was breeze. Unfortunately after nerfs might be harder, but still most of the damage You are doing from distance. Difficulty 6/10

Warrior Just focus on shockwave totem and gear with + lvl to melee skills, tree with just totem nodes and good magic potion. I died once during campaign, totems obliterating bosses with leveling gear ofc, but I bought only gear for 1 ex each, so didn't invest more than 10 ex.

Difficulty with leveling gear 1/10

Ranger I bought widowhail and quiver with damage to attacks (any) for entire campaign. I also bought rings, and gloves with high added dmg and gold rim and wanderlust. With this setup I was literally one shooting bosses and it was very fun and chill experience.

Difficulty with leveling gear 0/10

So If You want to enjoy thw game and leave challenge for another time I would recommend these builds. My friend switch to ranger Friday and today he is already blasting maps. Soon he will have problems, but now he can at least farm some currency while mapping.

If You want more help or You have minor problems, just Google thinks out, there is no possibility to answer many questions during blasting.