I can only think of three ways to find a party right now.
Stalker Mode F11.
Search online players within your level range and whisper them if they want to grind. The downside to this is that some players hate receiving random whispers asking to grind. Something you'll have to be careful of.
Spam that Mic.
Use Server Mics asking if anyone wants to party at a certain place. People tend to do this during 2x since they want to level up as much as possible.
It can get the job at times but sometimes you're going to have to spam quite a few and it'll be a 50-50 chance of whether you'll get a party or not.
Friends and Guild Members.
Ask if any of your friends or guild members want to grind with you. Pretty straightforward.
At level 8x, I didn't like to solo because of the grinding location. Spooky provided the best exp up to level 115 ~ 120 and you need a party for that.
At your level, the only way to make Ely is selling Astros.
The efficient way to make money begins when you can solo Sphinx at a fast speed (less than 5~7 minutes per run) to sell all the blue-colored equips. This also implies that you'll want a pet that has autoloot and an expanded inventory so you can pick up all the bags (especially during 2x with the increased drop).