...what your interests in life are..I don't even live in Doha but I assume that if you're into something you'll find a way of doing it..you're a mature lady you must have developed some interests over the past years. Are you into s[ports? There are loads of gyms in Doha many of them ladies only (I know rom friends) and you can do sports at a n easy pace if you prefer. If you're into reading there must be libraries in the British Council and what have you, maybe even reading groups. If you're a religious person there are scores of lessons at homes, mosques, everywhere.
When exactly did you arrive in Doha? If you're new you must appreciate that you need time to find your way around.
Wish you all the best!