Yes, once your channel completes the eligibility requirements of 1000 subs and 4000 watch hours in the last 365 days, you can go ahead and sign up for monetization. More info here: https://goo.gl/h5zWwx
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more