Hair and style advice, basically what should my style be like?

So, I'm a guy and I'm 18, soon-ish 19.

First, about my hair:

I want my hair to be longer kinda in the front, so it is capable of covering my eyes (even though I have glasses so it won't bother me), for some nice colored bangs and I kinda want it a dark red because I have really black hair, and I know it would be easy; the shades aren't that different. How should I dye it besides coloring all of my hair there? Maybe just color near the ends? Also I kinda always looked about 3 years younger than my actual age.

Now about my clothes:

So I don't have a lot of clothes that I want now, mostly because I used to be 179 lbs about a year ago and like then, I'm 5' 6". I went down to like 148 lbs recently and somehow I only have pants that are size 34x30s and 30x30s. I got a waist size of 31" approximately and my 30x30s are a bit tight still, lol. If I do get some new 32x30s (which is what I need and is between,) what kind should I get? I kinda don't know what style clothes I really like but I know I want maybe a hoodie that matches maybe a darker color scheme (I kinda want one that isn't expensive… But it should look fine, yeah). My favorite color is red but I know I have a whole lot of red clothes, and I think I need different clothes.

Oh, I should mention this too:

Is there like any kinds of apps for iPhone where you can get this advice from an actual person in the app and maybe send my pictures and all that? (If you need my picture here to answer my questions, then yeah I guess I can see if I can put one up.)

Sorry if I kinda put a big wall of text XD I just kinda want to see what general style I would like best.

How would anyone know what you would like? It sounds like you want a personal stylist, can you really afford one?

Buy or do what you like, it is up to you to define your own style. I would suggest you do not have a silly hairstyle with a freakish color as people will think you immature and not take you seriously.