As i have registered in a few networks. I am having problems in choosing the right offer to promote. Can someone write a few steps/rules/points on how to review an offer and promote it.
1. Ask your AM to recommend offer for you
2. Check top offers lists from networks
3. Spying is the best way to find one (adplexity, adsxposed, makemassive etc.)
There is one decision you have to make and that is what kinda vertical you want to dive in. First crossroad is ADULT vs NON-ADULT, what path will you take?
If you go adult - you will most likely start with dating.
If you pick non-adult - the newbie friendly options are sweeps or pin submits for example.
Then pick the GEO - many people choose the GEO they come from or at least one that uses a language they speak. This can be a good idea and it can be a terrible idea - depends on where you come from. If you're from US and you choose adult dating, then no, choosing USA as your first GEO isnt a good idea 
Once you have the vertical and the GEO ask your AM what kinda offers they have for this targeting. You need something that is showing good results across the network, but also something that is getting decent volume. Its good to choose proven offers, but its a good idea to choose something that is not too saturated by now.
Pick 2 or 3 offers and start testing.
This is one approach but you can also take the advice "miagrimm" gave you just above this post of mine : "3. Spying is the best way to find one (adplexity, adsxposed, makemassive etc.)"
- Dive into the spytools and find out what people promote, where they promote it and what creatives they are using to promote it. Then reach out to your networks and ask for the offers you found while spying.
Both ways will work if approached properly 
Good luck.