Hey, you've come to the right place that's for sure.
But for starters, what kind of music are you wanting to make? What genre are you thinking of making?
Also, it would be good to know what you already have. I'm guessing you have a computer and probably some headphones, any software at all or any hardware you could use? Any instruments or microphones? Anything you think you could use would be helpful. Honestly when making electronic music, I can carry my studio on my back in bag. You do not need a home studio with monitors and microphones to make good quality music anymore.
The necessities for electronic music are a computer, some headphones and a DAW (Digital Audio Workstation.) You'll need to try a few demos to see which DAW you like most.
A few big DAW names are Ableton, FL Studio (PC only,) Logic (Mac only,) Cubase and Reason, to name just a few. Try out their demos, and I think they all have cheaper versions for people who are just beginning making music so you don't have to spend a huge amount of money.
The next most important thing you need (in my opinion) are software synthesisers. Some of the DAWs will come with "plugins" such as FL Studio and Reason, but sometimes these plugins aren't exactly the best in the business and spending money on at least one plugin can do a world of good.
Some famous names are Massive (by Native Instruments) and Sylenth (by Lennar Digital.) These are two of the most well known and commonly used plugins by far. If you want to look at companies, look at Native Instruments, U-HE and Arturia. They have a range of good quality plugins.
The next thing you would look at is probably effect plugins, or a midi keyboard or studio monitors, however we should talk about what is ESSENTIAL here and none of those are essential.
So i'll summarise...
If you're making electronic music, you NEED a computer/laptop, some method of listening to the music (headphones or speakers) and a DAW. The next most important thing in my opinion is a synthesiser plugin or two.
But the most important thing is learning what you buy. Know the software well. You can't expect to buy this and make music instantly, you have to learn it and practise and understand your software. That is by far more important than buying every piece of software and not having a clue what it does.
I hope this helps because i've spent a lot of time on this. I started making music a year and a half ago and I am by no means an expert but this is my guide. Any questions or queries and i'll be happy to answer :)