How do I prepare to be an army wife when I have been so dependent on others?

So I have cooked a few things before, tacos, spaghetti, rice krispie treats, pancakes, hamburger helper haha. However I haven't really learned to cook, I either read instructions or had my mom or grandma guide me. My fiance says I'm a good cook when I made him supper a few times but I would like to be able to cook some more, especially when I visit him this summer because he is in the army and I think it would be a nice treat for him as compared to an mre or food from the d-fac. Anyways I really could use some advice. I mean can anyone be a cook like the chef on ratatouille says? lol I just wonder if I follow online recipes and cook books if I will be ok, I still am kinda unaware of how to work the oven at home (so many ons! lol I prefer old ovens) and also I don't really know how long to cook things for and how to know if they are ready. Also any other advice about things like cleaning tips would be great, I try to read stuff online to get prepared. I've basically never had to do any cooking or cleaning around the house except for cleaning rooms, occasionally bathrooms, washing windows, and doing laundry and dishes, but I still could use some tips. I want to be able to prove to my fiance that I can handle our home when he is away. I suppose I also have to handle financial manners too? That might be a problem, I have only balanced my own check book and kept track of my own finances but I have never really handled my tax forms or anything like that. I have been really dependent and I want to get some advice early before I get married so that I'm better prepared. My fiance has had some financial problems, like fines and stuff but I believe they are all taken care of however, I think he has bad credit. I think that the army is helping him with that and also he has to taken some personal finance cles. I'm in college for elementary ed and I just took an economics/personal finance cl, however, to my dissappointment the teacher kinda rambled on about nothing and that is what I learned. Ok, I learned alot but I am still feeling unprepared in many aspects. Please give me some advice, I know its pathetic that I've been so dependent on others but the first step in facing a problem is admitting it and seeking help so here I am :)