It's hard to say. Tests give you a rough idea of where you stand but they're not the be all/end all of fertility.
Regarding your weight : if your bmi is below 25 I wouldn't spend too much time worrying about it. You might want to look at your diet see if you can make a few small changes (eg : drink less soda and have sparkling water instead whenever possible, try to eat a bit more vegetables, make sure your diet is fairly diverse, maybe replace a snack with an apple, etc.) Staying active is good (it doesn't necessarily mean hitting the gym, an afternoon out shopping can be great exercise if you spend the whole day walking, or going to the swimming pool, etc).
Drinking : I'd avoid binge drinking but a few glasses is fine imo, unless recommended otherwise by your doctor.
Egg quality : there's no way to ascertain egg quality other than trial and error. Low amh doesn't automatically mean low egg quality.
some vitamins apparently can help a bit though there's a lot we don't know about this. Pp suggestions are good.
Genetics : whether or not your sister's ivf failure means anything really depends on the cause of your infertility. For instance, if she has endo and you don't, this obviously means your chances are better than hers. Some of it also does simply depend on luck but also your doctor, your environment, your lifestyle, etc.
The short answer is, you probably won't know where you stand in terms of IVF until you've tried a couple of cycles. You might also speak to your doctor and ask for an honest, gloves off assessment. But I wouldn't write iVF off until you've tried at least a couple of times (first cycle is often a trial to see how your body responds and what can be adjusted in the future).