Mannyrock
You should find O27 easier to work with and put the cars back on the rails as it is twice as big as HO. You should have no problems with O gauge once you figure out what you like and want as to train gear and a layout if you go for one.
First I would get some good books on O gauge trains. Some can be seen in the OGR topic on favorite train books trending now appearing below.
https://ogrforum.ogaugerr.com/...1#147972074728433951
I would go for Lionel 2018 or 2026 for a good inexpensive, great runners, good puller and rugged, simple valve gear engine. Or maybe a Marx 666.
Look at Lionel LW transformers at 125 watts and cheap with a lighted dial for night and light varies with voltage/speed.
Next up go for Lionel 2035, heavier and good puller. Even better and bigger, but as big you can go on 027 is Lionel 2046 or 2065. I would start with the 2018 or 2026 though.
For some of the best operating, reliable, and low cost are Marx 1590 metal frog switches. The frog or moving part should be metal not plastic. I have 31 of them on my layout, most for 40 years and only one or two has had trouble. The Marx switch will work with Lionel and even the fat wheel Marx like 333, that will not pass on Lionel switches.
I would look at the "for sale" forum on this site for train gear, eBay provides better choices but with more competition and local train shows are good with no shipping charges, if the virus lets them start up.
Charlie
Check out my topic on building my inexpensive layout with $10 turntable at link below with page one having a table of contents.
