I'd recommend these videos:
https://forums.elementalgame.com/391280
They'll give you a rough idea of early flow.
Other recommendations.
Play a kingdom faction so your sov starts with teleport. Any time you get in over your head early, like after you explore way out in one direction, tele home and start off in another direction.
Learn lvl 2 spell ability asap and then learn how to summon an imp. Imps are weak but still a decent early companion, and it introduces you to summoning. Mana burns up quickly, a summoned critter will help you thru many battles where tactical spells leave you mana free and stuck.
One of the early warfare items to research is logistics. This lets you build a super unit that's 4 combined units acting as one (group/squad/company). Even your low tech units are fairly strong in the group of 4 (gets 4x the health, attack, def). Your early units are very weak alone but in groups they're not so bad. It's one of the key mechanics to building strong armies so figure it out early.
Also, the unit designer is pretty simple and the units that get automatically designed for you are usually weak and cheap. You might wanna create your own variants with extra armor or different weapons - something to experiment with.
The adventure line of tech features one branch that will expose more resources on the map, this can be helpful early to get more resources hooked up and bump up key resources for other growth.
Usually every city spot has a fertile plot for a farm nearby. You usually wanna build a workshop first to get materials flowing. Then a merchant to get gildar flowing. Then the +tech building. Lastly the +arcane building. About this time you probably have enough to build a farm on the fertile plot, click on it, and build the farm. Once your farm completes you should have surprlus food, letting you build huts. Build 1-2 huts - this will let your city grow and level to level 2, opening up more potential structures to build. For later cities, build the 1st 4 buildings in whatever order suits your present needs/priorities.
Your sov builds your first city, after that, you need to train pioneer units. It's usually a good idea to roam your sov around your 2nd intended city plot once you build that pioneer because pioneer units tend to attract attention and get mugged/killed if they head out totally alone.
For your 2nd city plot it's nice to be nearish your first city within reason, and to ideally be near resources you don't have immediately at your capital, namely a gold mine to get more gildar flowing. Something that boosts materials or metals is nice early too. Decent troops require healthy amounts of gildar, materials, and metal to train.
As you develop more cities, research diplo branch to get trade, which lets you build caravan units. Build a caravan at a city and direct it to another nearby city - it'll build a road between them and start a trade route for extra gildar.
And so on...