When it comes to muscle building and bone loss, peptides alone won't get the job done. Resistance training and a solid diet are essential. Get your hormones checked, and talk with your PCP about whether HRT makes sense for you.
Low energy can stem from many different causes. Before considering peptides, get your thyroid, hormones, ferritin, B12, and vitamin D tested, since peptides can't correct underlying deficiencies. If those areas are all in order, then MOTS-c, SS-31, and NAD+ might be worth trying.
Inflammation is also complex. What type of inflammation are you dealing with, and what's driving it? Is it widespread throughout the body, and if so, what symptoms does it produce? Or is it confined to a specific area, like inflamed joints?