Here are some pointers to train music reading:
Grab a children songs book and try to play it.
Children songs are often very intuitive and quite easy. They might not be very violinistic, ie made to be easy on the violin, but if you play the ones in G or D major (1 or 2 sharps, resp) you will be safe.
If you are not so good at reading so you can play directly, sit down and just read/identify the note names and finger you would use to play it. Don't write on the score the note names and figers. This should be easy songs so writing the fingers might delay your progress at this stage. (Later might be usefull to right finger numbers when you need to change position or play a note with a unexpected finger)
Always have in mind which note you are playing
Every note you play in this phase should be with awareness of its name. Always have a "voice inside" saying/singing the note name. This will develop your reading skills but also (and mostly) your imporvisation and "catch a song by ear" skills. DOn't underestimate it.
Train Gmajor scale
Well, it could be another one, but G major is really natural to the instrument. In any case, take a scale and train it. Always thinking about the note name and finger. Play it with different rythms and not just plain equal length notes. When you feel confortable you can for example choose a random finger and try to answer fo your self which note name it is and how should it sound, then play the note. This is a good exercise, do it some times if you find it fun.
PS: Oh! almost forgot! Trust the tuner untill you know when you should not trust it. Baically it might be your best friend now, but it will probably not tune your instrument with perfect fifths. This is a separate question (and probably already here), but if you are starting keep to the tuner and ask someone who plays already for some years to tune it for you if you are unsure.