Hey. I had thyroid cancer two and a half years ago.
It is very common to have no symptoms whatsoever. And when they say thyroid cancer is treatable, it means that is virtually unheard of for people, especially those under about 50, to die of it. I went on a mad researching spree when I was diagnosed and honestly, found tstudies that ended with a version of "and we also intended to compare (whatever it was they were studying)'s effect on death rates, but we couldn't find enough people who died of it to make accurate stats!" I'm paraphrasing, but...that definitely gave me confidence.
Also, the treatment is not what you imagine when you hear "cancer". It's very unlikely that you will have to have chemotherapy or radiotherapy or anything like that. Generally, removing the thyroid and possibly some lymph nodes, if it has spread to those, pretty much treats it.
You may also need radioiodine treatment to reduce the risk of reccurrance, but that is basically just swallowing a capsule. It's annoying because you have to get injections beforehand (and you may have to go on a diet for two weeks before it) and then afterwards, you are radioactive, so you have to spend time in isolation to avoid contaminating people, but it doesn't hurt or make you feel sick or anything. It's just a hassle and nothing more.
How it went for me was I was diagnosed in November 2019. I had my surgery to remove my thyroid on the 6th of January, 2020, went back to work about the 6th or 7th of February and that was basically that. I do have to take tablets now to do what my thyroid previously did and I had radioiodine treatment the following May. It should have been over the Easter holidays (I'm a teacher so that would mean I didn't have to miss work), but as you know, the world shut down.
One thing is after the radioiodine treatment, if you get it, they will probably do a full body scan. Waiting for the results of this is a little scary, although the consultant pretty much told me she wasn't expecting to find anything, you always worry you will be the one in a hundred where it's spread or something.
Apart from the inconveniences, it really wasn't much more of a deal than say getting your appendix or gallbladder or something removed. If it's any consolation, there was absolutely no issue about my going back to work during covid.