Then take note of the basic tips and advice I have for you. Below are a list of basic questions to ask yourself before you start editing. There are no right or wrong answers for these questions, they're just there as a road map for you.
Why do you want to start editing non/Disney crossovers?
What editing software do you have?
Are you familiar with the software?
Do you have some free time to edit your first video?
Do you want to have manips and masks on your video? If so, do you have any masks or manips to work with?
Would you make masks and manips yourself, or would you rely on other editors' masks and manips?
What video platform/website do you plan on hosting your videos on?
Do you know which songs/films are banned on that website?
Of a song is banned on the website or in a country, do you have an alternative plan for people to see that video?
Do you want a small group of people to see your videos, or a large group like YouTube?
Have you decided on a screen name for yourself, or are you just going to use your real name?
Do you know what kind of crossovers you're going to create, or are you just going to make what comes to mind at the moment?
Again, no right or wrong answers. These are just little things to consider, and the questions are based my own personal experiences and I just want others to consider these things too before they get started.
In reference to question 1, I'm sure there are other editors who have inspired you to try making crossovers yourself, so focus on what it is about those editors that inspired you.
Was it their editing style?
Was it the music they used?
Was it the story they made?
Find out what you like about the editors' video and ask yourself if that is something you would to do in your videos. If that is not the case, then what would you like to do with your videos? Trying to stand out from the masses would be a tough task because every editor is unique and every style is being showcased every day, but that doesn't mean you won't stand out. Every story and editing style has been seen, so just make what you want to present and let the video do the rest.
The other questions would require some research and experimenting until you are comfortable with the results. For instance, Adobe products are not free, but the older programs usually need to be purchased once and you can use them without a subscription fee. However, the newer versions would be more suitable for the latest computer models, but they do require a subscription fee. If that is something you cannot afford at the moment, I will create a list of some free or less expensive alternatives to Adobe in this forum, but until then, fee free to do your own research and don't be afraid to watch some tutorials about the programs to familiarize yourself with it before you do any free trials.
Another thing you can do before you start editing is ask other editors about any songs they used that were banned. Of course, not all channels get the same result, but more often than not, certain songs get banned in other countries, and if you want to reach a worldwide audience, then I suggest asking others about certain songs being banned in other countries so that you can make a list of which songs to avoid (unless you plan to have your viewers access those videos in a different way).
As for a name, choose whatever you name that either applies to the content you wish to create, or a name that means something to you. A lot of names are already taken though, so browse around YouTube (or whichever video platform you choose to use) and see if your chosen name is already taken. You can use a similar name if the name is referenced to someone who is not a crossover editor.
If none of these questions applies to you, then you're off to a good start, because that means you're open-minded to whatever comes your way and having specific content for your channel won't be necessary until later.
So that is all I have for this post. The most important thing I can tell you when it comes to this hobby is to just have fun!