back, SG ~ that's an interesting moniker; does it have a special meaning? Or do you have a nickname that we could call you? In the Dieting with Obstacles forum, there are threads at the top of the page for both Diabetes (and that includes pre-diabetes and metabolic syndrome), and PCOS as well.
If you have any other interests, there are many forums and countless threads covering a wide range of topics. Have you decided on a plan yet; there are many discussed here, or you could create one of your own. Some of the best tips I can give you is to make a committment to yourself to look after your health again; as far as motivation -- you could probably make a whole list of things that you hope to achieve through this journey; and they can be your motivators.
Also, I find tracking or writing down what I am eating to be extremely helpful; many others do too. Planning what you are going to eat each day and week is very important -- it helps you stay on plan (OP) as well.
Glad you came back and hope to see you around the threads ... and often!