Welcome to 3FC =)
Put motivation completely out of your mind for the moment, and instead think about building habits. Habits don't require motivation. They simply require getting used to doing a certain thing.
Yes, it takes effort. And yes, sometimes we'll feel like doing it, and sometimes we won't feel like doing it, but we still brush our teeth every day even when we don't feel like it. So we don't really have good excuses for not eating healthy or not exercising when we "don't feel like it".
Continuing with the teeth brushing analogy, if we slipped up and forgot to brush our teeth before going to bed one night, we wouldn't just... stop brushing our teeth altogether! We'd very simply, and without question, get back to it the very next morning.
Under the Food section there's an area for Shoestring meals. That's meals on the cheap. You can usually get a good deal by making meals in bulk and then rationing them out and either freezing them or keeping them in the fridge for each day during the week.
There's a Calorie Counters area, and a 20-something's section to start you off.
Jump on in. And keep in mind that no matter what's going on. No matter how you feel. Keep at it. You never have to be
perfect in order to lose weight, no one here is perfect. There will be slip-ups, mistakes, times of low motivation, but the ones who stick around and keep going regardless are the ones who succeed.
Best of wishes