Hi FortyNothing (from SixtyFiveSomething AKA bocaholly Welcome!

Here's a previous thread that asked a similar question (minus the 20+ years ... although a couple of the folks who answered did, indeed, fill that bill when they began violin.)
https://fiddlerman.com/forum/l.....-1/#p92108

I'll throw the following hypothesis out there. Whether you're a beginner or violin pro and whether you have much experience with other instruments or not, the basics of a healthy practice routine are similar:

- Technique exercises
- Scales 
- Pieces

I have about the same amount of time per day available as you and my mileage varries on how I apportion my time. Usually a minimum of 15-30 minutes each on scales and technique... the rest on pieces. My beginner piano routine is similar. Fairly standard stuff.

Additionally, most of us violin starters spent plenty of time figuring out how to get comfortable with that contraption. Use a large mirror and/or video to record yourself. Figure out an optimal chinrest / shoulder rest (or none) combo. And take your time getting the "simple stuff" like intonation, posture and bowing as solid as possible from the start. 

If you're interested in specifics about scales and technique exercises, let us know. I'm sure a bunch of folks here would be willing to chime in... especially if you don't have a teacher.

Out of curiosity, what else do you play and are you going to be working with a teacher?

Nice that you have a teacher for starters. Keep asking questions here and where ever you can, post a video or more if you want a few "attaboys" and some useful feedback...

... and, above all, use that valuable teacher time working on the fundamentals. 

Hope to see you around here again!

Holly