I would suggest get married for the xp with a faithful grinding partner if possible to get that bonus. Also put skill points in your provisioning and buy some xp potions if you have the gold. Should you get eso plus then you will obviously get another 10 percent on top of the other perks mentioned. Aoe grind mobs and you will level up faster then ever. I don't think not having eso plus will h u r to much but will save you a little more time.