There isn't really a "wrong" choice between getting a Godox strobe or sticking with speedlights.
There are technical considerations, such as that the Godox can put out as much power as a bunch of speedlights all at once. And it connects to modifiers more easily and distributes light in a better way (the speedlight has a permanent "reflector" with fresnel-type lens built in). And the Godox can recycle faster, go longer, etc. All of these benefits are potentially useful to you.
There is also nothing wrong with sticking with the light you have and using it to build skills till you need a capability the Godox brings.
Another alternative is to get a monolight (perhaps an inexpensive used model) which has a strong modeling light, which can be especially helpful as you learn because it gives you more idea of what the light will do. Not that you need this--you can take a shot and see--but for some it is very helpful to move the light or subject and be able to "see" the light and how it changes in real time. You do need a relatively dimly lit space for this to work well.
All we are going to be able to do is reflect our own experience for you. Not that it is a bad thing, but it isn't necessarily the answer for you. 
My advice: absorb what people say and then take a step back and decide based on what gets you excited. It sounds irrational, but your emotional connection to working with the equipment can make a big difference in how confident you feel and how frequently you use it. And frequency of use is what matters most. Because skill comes from experience. With skill, you can get great results with just about any strobe set-up. And, as is probably obvious, whatever gear you have will do no good without skill.
The trick is to make one solid purchase (a light and a modifier) and then use the heck out of it. The temptation is to keep chasing after a piece of gear which will "solve" the problem. People spend fortunes this way and still can't get a decent image.
