Looking for career advice: what skills should I develop to advance my graphic design career?

So, without going into TOO much detail about my background, I pursued a career in art, but sort of fell into more of a graphic design position instead. However, since I was trained more in traditional drawing and painting, a lot of the graphic design skills I've had to learn all on my own.

After a few failed attempts to get a steady job in the video game industry, I've instead settled as a graphic designer / print production manager at a small sign company. I do enjoy the job for what it is, but I'm not seeing a ton of advancement in this industry. Looking up various graphic design job postings, the entry level salary seems to be a lot better than what I'm getting now.

Problem is, the average graphic designer job postings I'm seeing have several areas that I'm not very well versed on. Things like: web design, wordpress/html, motion graphics, video editing, etc. I don't know if I feel comfortable applying to these positions since I don't really feel like I have these skillsets.

Described things like: "web design, wordpress / html, motion graphics, video editing, etc." - different directions of design. In each direction there are valuable features and basic things. I am not professional in this to give advice. But, as a beginner, I can say: study first of all what you like best. This will give fast growth. With the progress of training, you will comprehend the sphere and understand where to move on. More practice and everything will work out. Do not be afraid to take different orders - this will speed up the study and allow you to understand what you need. Good luck.