TSM has a very steep learning curve, as it is a total profession framework. It does not hold your hand, and requires a lot of setup. Luckily you can import settings from other players and there are a ton of settings out there. I have published most of my settings in my pastebin here. You can also check out Sheyrahs. TSM recently upgraded to version 4 and I have a written guide for TSM here that is currently up to 11 parts covering all of the basic functionality.
To exit a instance quickly. Create a group in the Group Finder when you are finished in the instance, then leave the group. You will then be ported out of the instance after a minute. When you got a dungeon down, you can make and leave the group around one minute before you reach the end of the dungeon and you won’t have to stand around and wait for 1 minute. This will teleport you to the nearest graveyard, on most dungeons this is right outside but on some there is a bit of a run.
Azerite equipment is currently balanced around being able to unlock the outermost, earliest tier of power immediately upon acquisition, while delaying further advancement until the Heart has been further empowered. For example, the first piece of Azerite equipment, gained shortly after the Heart itself, is fully empowered once the Heart of Azeroth has reached level 3. A character at 120 (the maximum for the expansion) may find a piece whose first tier requires the Heart to have grown to level 12 or greater.
An alt (low level or no) in a capital city is an effective way to not only cheaply increase your available bank space, but to be a simple savings and auctioneer account. This character can serve as your bank, an auctioneer, bag-space creator and a time saver. Get one. (There may or may not be Item Recovery issues with characters below level 10, in cases where one's account is hacked.)
These farms are class specific but can be done with class trials. You can only play a class trial for three hours, so before you have to remember to mail any gold or items before that. When your three hours have gone, simply make a new character. Many of these farms are very good if you can park a character at the farm, log in, farm a while, then come back and farm more at a later time.
Taking Herbalism and Mining as your two professions can be a lucrative way to level with the very stable and high prices of herbs and ore thus far in BfA. While rested, each mining and herbalism node will award nearly 4,000 experience points which makes it so that four to five herbalism or mining nodes is equivalent to one quest. If you have the Sky Golem mount for herbalism, you can pick herbs without losing mount speed. There are also enchantments for gloves that will increase the speed at which you can process the herbalism and mining nodes. These can be made rather easily by an enchanter and should be relatively inexpensive on the auction house. These enchants will pay for themselves with the time saved while herbing and mining. Remember to continue completing mining and herbalism quests while leveling up to increase the yield of each node making your herbalism and mining leveling experience exponentially more lucrative.