First off, good work on the major fat loss. Thats kick ass. Its hard to say whats going to work for you. We are all so unique. that said, if you don't handle carbs well, they probably are smart to stay away from . Can you grow muscle without them? Sure but it will probably limited. there are many ways you can try to add them in, focusing on nutrient timing, like only using carbs around training and removing them on non training days. You might be able to work them in, who knows. If you want to try, just try 30g pre workout from rice or oats. Then see how you are looking after a week of this. As long as you keep reevaluating and watching progress, you are never going to get fat again. Also consider a GDA like berberine or metformin to counter some of the negative impact of carbs. Thats a game changer for some people who have a rough response to carbs