What are the real dangers with wood burning?

So......I went and bought a moisture meter from harbor freight and tested my wood. Some of it has over 35% moisture content, some of it less than 20%. Most is too wet though. I went to my cousins house and borrowed some of his dry wood just to try it out. So far the difference has been quite significant. Much easier to light, able to burn larger pieces, even seems to burn longer if that is even possible. If it weren't for this site and your help, I might not have discovered this for some time. I appreciate the help greatly. I also returned the ash vac and plan to just get a good pail with lid. In the past when I just took my time and scooped slowly there wasn't much dust. I am wearing a N95 mask when I open the door to reload or clean out, just as added precaution.

I found a nice metal firewood rack on clearance at Lowes for $16 that was marked down from $60. I couldn't pass it up. I put it right outside the back door and plan to keep all the dry stuff there for now. It holds half a cord. Now I just need to restack all my other wood in a way that will help it dry. And it looks like I might be buying some wood, which I thought I was going to be able to avoid with all the free wood I can get, but since it is too wet I need to find dry stuff for now.

How long should I expect to wait for this wood to dry out? It was sitting as 16" logs outside uncovered for 2 years give or take and has been split for 2 weeks.

Sorry, I just read through the posts again and saw that time for seasoning was already mentioned by BACKWOODS SAVAGE. I have been checking the thread on my phone and it is easy to scroll past a paragraph without knowing it. I was actually reading some while in a meeting haha, that's how much I'm thinking about this.

Thanks, I think I have that book somewhere. Lots of history there