Advice appreciated

I have been playing this game more and more seriously over the last two months since I started. I dropped some money and might eventually drop more but am at a point where I won't because I can never seem to get enough credits. So going FTP for awhile now... How can I take what I have already and go forward or please list more to farm. Currently level 73 and not incredibly far on any map. List is;
LU 7⭐️ 8Gear
Talia 7⭐️ 8G
DSid 7⭐️ 8G
Vent 7⭐️ 8G
JC 5⭐️** 8G
Chewie 4⭐️ 7G
Ashoka 5⭐️** 7G
JKA 4⭐️ 7G
Boba 4⭐️ 7G
CDook 4⭐️** 7G
Rex 4⭐️ 7G
Old Ben 4⭐️ 7G
RG 3⭐️** 7G
Cad bane 3⭐️ 7G
IG-86 4⭐️ 7G
Tarkin 4⭐️ 5G
HK-47 4⭐️ 4G
IG-100MG 2⭐️ 4G
QGJ 4⭐️** 4G
Jaws 3⭐️ 4G
RT 2⭐️ 4G
ES 2⭐️ 4G
CP 4⭐️** 4G
Veers 3⭐️ 4G
SnTrp 3⭐️ 4G
LSky 3⭐️ 4G
Biggs 3⭐️ 4G
MgmTrp 2⭐️ 4G
CUP 2⭐️ 4G
JKG 2⭐️4G
NsisIn 1⭐️ 4G
CSP1 1⭐️ 4G
** all shards collected to open next ⭐️Level just waiting on funds.
Vader - 1 achievement away from unlocking
Daka - about 20 away from unlocking
Yoda - 1 "level" away from unlocking.
As you can see I've had massive character ADD with unlocking... Please help with where I should put the most focus!!