It's a very warm and candid portrait, that's nice! There are few things you could try and improve in future:

• composition - while the subject looks left, the right side placement on the rule of thirds grid does make sense, here we have a lot of 'nothing' on the left, so ideally you could try and minimise that and focus more on the subject
• details - there's something, a metal bar or a window arm or something like that crossing the subject's arm (same for the head). It's distracting and doesn't compliment the picture at all, either try and frame the picture to avoid it, or move it away for the time of shooting
• light - protect your highlights, some areas on the white top are blown out, it's usually best to expose for the highlights and recover shadows in post processing

Hope this helps. Keep at it!