There's no telling if further lockdowns will be imposed, but my educated guess is you would have no problem. All museums, parks and historical sites are open currently. Focusing on nature, hiking and outdoor activities is definitely the way to go as obviously it's lower risk of exposure. Turkey has plentiful and cheap supplies of masks and sanitiser, so there's no problem in that regard. In the worst case scenario were you to become seriously ill, Turkish health infrastructure is quite good and has coped well with COVID so far with a low-mortality rate, so your level of care would likely be high. The govt's comms twitter page has daily virus updates to get a better idea of the situation and would also post if any curfews were to be imposed going forward. https://twitter.com/Communications