There are a few easy solutions to try.
First, I recommend a tail piece with adjustable tuners for all beginning students.
Why? Because tuning only with the pegs is tricky and requires an excellent ear and a lot of patience.
Having trouble getting your pegs to stay?
There are techniques to use to help with tuning. You might need new pegs or work on your existing pegs.
Give the shop a call at 685-8402 and I can help guide you through the tuning process.