I am always on the lookout for resources to help beginners in the home Machinist /model engine hobby. I came across some beginners video on you-tube produced by smithy.
If you click on the Machining help tab you will see a list of additional resources that may be of interest to folks here.
This link should be of particular interest to owners of of 3 in 1 machines smithy's specialty.
I am not endorsing smithy or recommending a 3 in 1. but I do know that the 3 in 1 is a viable choice and some folks have them.
also this appears to be basic info applicable to all machine shops with lathe and or mill.
I watched the first 3 (lathe) videos) they are packed with info a bit fast on the video cuts. and cover a lot of material in a short time. so not long or boring and can easily be reviewed repeatedly if something is missed.
these videos are as I mentioned earlier on you tube.
This could be the info needed to get good results from your 3 in 1