My first instinct is to recommend support from a Personal Trainer. Other ways to keep motivated are to start a fitness journey with a friend, so now you are sharing motivation. You can also find exercise that you enjoy, something which you may look forward too! You can also start with small steps, and you may be surprised that after you see that first kilo or 2 drop off, suddenly the motivation kicks in! Start now though, don’t wait for better weather or the right time – there is no better time than now!