Dude this game showers you with so much shit its fucking unbelievable. This game has more stones than Rock Garden of Chandigarh. Then all the scrolls, the books, potions, candy fucking blue chests, gold chests shiny chests. Its all fucked. But if youre playing on season server go see fughar and his little elf chick thast stands beside him, hes in every city by the stables. The littrle chick sells all the shit you will need to level, food, 530% exp scrolls, mount food, all for 1 silver ea.
There is not enough time to be doing all the side quest shit, season is only till march 31 so only do main quest up to mediah, by then you will have all the armor and stones you need to upgrade all of your blue armor to V and then trade it in with Fughar to get the next set, which takes a shit ton of farming to get leveled up. Probably will take you some 20-30 hrs to run through that story if youre a noob like me. Bonus if you jsut run through the story shit, they will give you mounts, pets, inv slots and all the shit you need. Then when the server kicks you to standard after season you can convert the gold gear you have in order to use it on standard. So that should be your priority since the gear is pretty decent start. They also give you rings, necklaces and other trinkets you cannot use on this server, I think from achievements? But once you get kicked you will be able to, so keep it in storage.
This dude has a ton of easy to understand vods that will set you straight. (he also has a guide on the horse thing you were trying to do)