Should I upgrade to th7 when I get chance?

I have 600K gold at the moment and have nothing to spend it on so I was wondering weather or not I should upgrade to th7 when I get 1.2 mil. I do not have healers yet which is the main reason I may not upgrade (I only have 214K elixir because my clan are pushing and fighting in clan wars). Also my walls are underdeveloped (Mostly LV4 and LV3 with about 10 segments lv5). My defences are developed though with lv7 cannons,lv6 Archer towers, Lv3 mortars and Lv 2 wizard towers.
Should I upgrade?

maxing out your town hall when it is that low is easy. Max it out first. I will be worth it in the long run

Spend that 600k gold you have on walls. It sounds like you need to.

I thk its possible to rush th 7 but your walls are really too low, get them at least lvl 5/6 before up your th.

upgrade your splash defenses and walls