What is the minimum amount of effort I can do to improve my PC slightly for gaming?

Lenovo
Windows 10 Home
Intel(R) Pentium(R) CPU G2030 @ 3.00GHz 3.00GHz
4.00 GB of Ram
64-Bit
Intel(R) HD Graphics Card - 1792MB Available - 32MB Dedicates Video Memory

So what is the least amount of work I can do to improve my PC's capabilities?
Can I just get a better graphics card and more memory or do I need to improve other components all together?

Your cpu is too old for modern gaming

you need a intel i5 to i7 cpu for modern gaming

First, do a tune up and uninstall junk programs that hog memory.

Video card would give you the biggest increase by far

It looks like a laptop, is that a laptop?

If it isn't a laptop, then I would look for a video card, but you have to make sure your power supply can provide enough power for a new video card.

32mb is what my older dell latitude has as dedicated video ram even if you put a good gpu and a require psu in the system some bottlenecking might occur running some games, i would suggest a upgrade of most parts if into a lot of modern gaming and having it run smoothly