With all the changes since One Tamriel then Morrowind, I find myself leveling much differently than I used to. New characters, for the most part, skip questing until much later instead I go around hitting up every Sky Shard I can get in the overland and in Delves, I purposely skip Public Dungeons until last. I'll still do quests I come across in Delves or related to their area and a random dungeon a day. Once I've gotten all the available Sky Shards that I can reach, it gets me to around level 36 which then I start doing the main quests that award skill points until around level 45. At this time I swap over to Public Dungeons that I skipped before as they give a lot of experience that you gain 1 level for every 2-3 you complete up to level 50. I have crafted gear with training at levels 4, 20, and 36, you don't need to upgrade all that much when sky shard farming.
After that, I complete whatever else at my leisure or move on to the next character and repeat the whole process over again.