Good questions!

"Do you see any potential challenges with this jump before completing the acoustic lessons?"

Not at all.  Since you know what style of music you want to play switching to electric as soon as possible is a great idea.

"Guitar: Ibanez RG652AHM Prestige"

Those are very nice guitars & well suited to rock & metal styles.  As long as you've actually played one & you know it's comfortable in your hands, then it's a good choice.

"Amp: Marshall JVM410H"

This choice has a couple of potential downsides.  Marshall is of course a great, legendary brand.  I own a couple of them & they are wonderful machines.  But they typically only sound really good when they are turned up.  That's what they are designed to do.  And they are LOUD.

They are also big, heavy & cumbersome.  The model you listed is also just the amp (the "head"), you'll need a speaker cabinet to go with it.  The head is alone is 50 lbs.  And a 4x12 speaker cab is about 80lbs.

If you are set on that amp, that's a great choice for metal, but you be aware of what you are getting into.  It will serve you well for years if you keep playing & want to gig with it.