With pacing, I’d keep an eye on your word count for every scene (as long as you are using a word processor in which you can do that). Unless there is some reason you need to add in purple prose, your mantra for every scene/chapter should be get in, get the story across in the most economical way possible, and get out. As a beginning writer, I found it very hard to cut material, so the more you can stick with this, I think the more likely you are to not end up with an unhealthy word count that you will have to cut later. However, with that said, I would avoid editing as you go. That will slow you down and cause unnecessary frustration. First drafts shouldn’t be frustrating; save that for revisions.
Plotting: I saw you said you have an outlining process already, but make sure that you are outlining scene by scene, chapter by chapter (even if only vaguely), and you know which scenes are the important scenes/chapters in the book, like which one is the climax, etc. Mark those important scenes somehow so you don’t forget them or forget to build up to them. Also, the earlier on you decide what sort of story structure you want to follow, the better.
Character development: Please, please, please, spend time with your characters. This is the only way you can develop a character into one that feels like they can jump off the page. Let yourself daydream about them. Let random things in your real world remind you of them. Put them in crazy hypothetical situations where you can think about what they would do. Also, you need to know what they really, truly want in your story, and you need to know if you’re going to give it to them or not. They may want multiple things. The main plot is likely going to be one thing - the most important thing - and those other things may be subplots.
Set goals with your writing, but make sure they are realistic. Give yourself grace with these goals. If you don’t meet them, try again next week. You’re just starting out and figuring out how you work, more than likely. It takes time to work out the kinks in your process, and you likely are going to be balancing it with school and/or work and other obligations you may have. It’s completely acceptable to take a day or even a week or two off. You’re going to produce better work if you’re in the right mindset rather than trying to force something out just to meet a self-made quota.
Writing often takes a long time, and it can be months or years until you have something to show others. That sometimes makes it feel like a finished book will never happen. When I start a project, I like to look ahead and figure out if I write so many chapters a week (generally two for me), I will finish the project in the week of X. It makes me feel like the process is more concrete and gives me incentive to keep working even if it gets hard because at the end, during the week of X, I will finally have a complete book.
Hope this helps!