White steam from exhaust?

If your exhaust system, catalytic converter in particular, is working properly, water vapor is one of the byproducts of burning gas. That can show up as a little steam, or water dripping from the tail pipe or a small hole at the bottom, rear of the muffler. That little steam is normal, and you will smell the chemicals.

What you want to watch for is a lot of white smoke, and the level drops in the coolant reservoir. That level will go up when the engine is warmed up, and it will be a lot lower when the engine is cold, but you should not need to add any. If that level remains in the same range, there's nothing to worry about.

If the coolant level does drop over days or weeks, it is usually caused by a leaking cylinder head gasket. Unfortunately that has become rather common since the late 1980s, but it is not a good suspect yet at the mileage you listed.

Here's a couple of articles you might want to take a look at:

https://www.2carpros.com/articles/how-to-check-engine-and-battery-pack-antifreeze-levels

https://www.2carpros.com/articles/white-smoke-or-steam-coming-from-the-exhaust-pipe