Emma, when ever you go up an age you want to be able to race to first useful troops as fast as possible, so that means building up FP and Goods that are required, or you might get stuck on LMA level fighting LMA troops with only HMA troops. plus all event stuff will change and start asking for LMA things to do!
To get great swords and Longbow (longbow is more useful i think) you need 25.5k coins, some supplies (both ticked) and 80 herbs and 150 copper (fails). so today i would say no.
Now i am guessing, but I would bet you dinner that none of your GB's are at L10 or greater and most will be L5 or below. This is really hurting you as they are taking up 75% of your space but not giving enough back to you as too low a level. So take a month out to build up goods and get some of those useful GB's up to a decent level for a LMA player (do not invest more in babble as odds are you will delete it one day).
Personally if I was you i would stay in LMA for 6 months and get that ARC upto L80, then never have a shortage of medals/BP/FP and medals are the most valuable thing for a LMA player as they pay for expansions.
PS great question and one many newish players should ask.