Premature vs Mature town hall

Before edits in your question:

So from what I understand you want to lower your townhall level. Well for a first, if you are getting low loot then go into a higher league than you already are. Also what do you mean mature? Another thing, there is no way to lower your townhall level. The only way to get more loot is to rigorously search through the match-making and hope you get good loot or heighten your trophy count. I also highly suggest you upgrade everything before upgrading your townhall (this includes troops). I also have a level 8 townhall but my level is 67 and am currently at 1600 trophies and my highest was 1800 so I highly suggest taking my advice.

After the edits in your question:

Yes it is possible to "mature" your village. there are two ways:

A: Start farming, drop your trophy count and try upgrading your recourse collectors. After you have a good amount of loot income start upgrading troops and defenses. If you are unsure of what farming is I suggest you google it. I'm sure a good link will pop up

B: Attack, attack, attack. Keep attacking and go mainly for loot and don't mind the trophy loss. Search some good loot army camp layouts and watch some videos on resource attacking.

It is your choice which one you want to do but in reality it's all patience and hard work. I did the same thing when I rushed into townhall level 7 and had a hard time but now I'm the second strongest in my clan. Good luck to you on maturing.