This is just me, but use what you've got until you know what you need.
Your inexperience and lack of knowledge are likely to be far bigger stumbling blocks to getting the image quality you want than the gear. Things like megapixels and frame rates, etc. all make less difference than messageboard discussions make it out to be. Lower-end gear tends to look worse because it's bought by newbs who don't know what they're doing. $3000+ cameras tend to look better because they're bought by experienced, skilled, and talented photographers who do know what they're doing. But just as buying a custom Fender Stratocaster doesn't mean you'll become a rock star overnight, getting a higher-end camera doesn't mean you're gonna shoot Vogue covers overnight. You gotta learn how to use your tools.
Sure, an 18-55 is low end and limited. But how you use it is still going to be more of a problem than the glass itself. And you need to learn how to use one lens to figure out what the next one you want is. Unless you're happy shooting with what your friends prefer, rather than what you know you need.
There's also the fact that camera gear shifts all the time. The 60D was followed by the 70D, which is now followed by the 80D and 77D. And in six months time, there may be another model or another or another, ad infinitum. The longer you wait, the better the tech you'll score when you do plunk down your dollars. And the more specifically you can tailor to what you want/need.
I went from a dRebel to an XXD to a 5Dii, to a micro four-thirds, to an X100T. It's a journey. And the end goals are different for everyone, because what/how you shoot and how much you can spend are specific to you.
My only advice for purchases early on are to invest in cards, batteries, a card reader (if your computer doesn't have one), post-processing software, and hard drive backup. Then you can think about lenses and bodies. And by then you may realize a dSLR isn't what you want.
See also:
What do I need to consider to choose between dSLR, mirrorless, or a compact as my first "serious" camera?
