Visit Thailand... yes
Visit Thailand alone... NO
If you were my young sister or my daughter, I would not allow you to visit Thailand by yourself.
There is a business in Thailand that depends on nice looking young ladies like yourself.
The people who run the businesses are criminals.
They might see you, think that you are Thai, see that you are alone, and do something very bad to you.
I'm sorry if you do not like my answer, but a young female, travelling alone, is always a little dangerous, so I told you my honest opinion.
Travelling in a group is much safer.
What specifically would you like to know?
What kind of holiday are you looking for, culture, beach, party....
I've loved and worked in Thailand and am happy to answer any questions :-)
Here are some links about culture trips to Tailand might help you!
<a href="https://theculturetrip.com/asia/thailand/articles/10-places-you-must-visit-in-thailand/">https://theculturetrip.com/asia/thailand/articles/10-places-you-must-visit-in-thailand/</a>
<a href="https://theculturetrip.com/asia/thailand/">https://theculturetrip.com/asia/thailand/</a>
<a href="https://www.travelfish.org/country/thailand">https://www.travelfish.org/country/thailand</a>
<a href="https://www.roughguides.com/destinations/asia/thailand/">https://www.roughguides.com/destinations/asia/thailand/</a>
<a href="http://www.touropia.com/best-places-to-visit-in-thailand/">http://www.touropia.com/best-places-to-visit-in-thailand/</a>
Have a nice trip!