Very new, howmuch can you change with RPG maker MV

I have been reading into getting into game design/development/programming as a new on the side career/hobby and taking it very seriously.
My question - How possible is it to change/upgrade/further develop games you create with MV? If I knew programming well, could I change almost any aspect or feature with the way MV is set out? I am asking as I plan to spend a great deal of time learning and exploring ways to maximise a game with MV. I noticed some people made battling scenes with button music bashing. Can we add side scrolling mini games for example? or a card collecting game like they do in final fantasy games?
I mean, I guess as a programmer you can do anything but does the creators allow for these sorts of things as well?
What are the limits of MV? broad question i know but can anyone give me some insight please :)?

Thank you very much for your time and I really hope I can start to become a part of this community.

Since you're a programmer you should know the answer: the limit is when stuff can't run anymore because it's too demanding. Basically any features is implementable as long as you can code it in javascript and the engine can run it. So yes, you can almost everything and everything you mentioned (custom battle system, side srolling mini games, etc.) is quite doable.

This is not MV, but using older engine. I believe MV could also make something like this too. It's a complete rewrite of the engine default code.

You can, indeed, change almost anything you want in MV. The game code is all available and can be edited to make it whatever you need. The big caveat is that the game code is written to be specific to the RPG genre and can therefore be more difficult to make a game that's radically different from the RPG genre than if you used a different game engine where you have to build a lot of things from scratch. Sometimes having a blank slate is easier to work with than one that needs torn down and then built back up from scratch.

With MV, the entire code is open (previous makers had some graphic function closed in a protected dll, that is no longer the case).
However, while this makes everything theoretically possible, it is of course more work for more complex changes.
and without a hint of what you're considering, we can't guess how much work your ideas would require.

I am happy with the answers and will proceed to purchase mv alongside an extra pack. Does mv have all the content , if not more from previous versions?

@Calmerencer Not really. I mean the default TRP resources are pretty similar to the previous RPG Maker version (VX Ace), even better since tiles are now 48x48. But if you're talking about dlc and stuff, they need to be converted to be used properly in MV. Also many of them require you own VX/VX Ace for you to use, so better stick MV resources.

Do you mean previous resources? No it doesn't and you'd have to own the previous engine to have a license to use those resources too.

But MV resources are very similar to VX/VX Ace resources. Very different from XP resources however.

Hey again guys. I am scrolling through add on packs and curious to what I think I should be buying. I see some packs containing animations, sounds and tile sets and thinking if these are useful to purchase? I mean once a person knows how to code/develop a bit can they start creating those things with little to medium effort? Also , is there a place you can get free resources from another site or is everything pretty much a cost everywhere you look, legally speaking of course?

Thanks again!

Yer thats pretty cool, i want to do a huge mix of games. I am really love getting into this so far :)

Personally, I think you should figure out the type of game you want and then worry about the DLC. Many can't be used together and it can get expensive. Plus, you might want something more unique to your game, no reason to pay for two sets of resources. Of course this advice comes from someone who owns almost every pixel pack and is still not making a game. . . .