Your friend is trying to quit drinking to become more healthy. what can she do to improve her chances of success?

She can remove herself from drinking environments, and she can stop hanging out with her friends that influenced her to start drinking and that she drinks with, hope this helps

Exercise a good place to start, also you can go to meetings. You can probably find some in your local area. If it dosent help reach out and maybe go to  a clinic.

10% more body fat than is recommended i believe

You should only go in for less than 10 minutes at a time, or avoid them altogether, especially in the early weeks. studies have shown an increased risk for birth defects in babies of women who had an elevated temperature before 7 weeks of  pregnancy.