Suzuki Method & Alexander Technique
You can rent or purchase an instrument.
If purchasing, do your best to avoid instruments $200 or less, as low quality can make learning to play more difficult. Avoid big retailers like Amazon and Walmart, and scan local marketplaces for families selling used instruments. Instruments can last for many years with proper care.
Visiting instrument specific websites and stores can provide you more information on proper sizes, price ranges, and pros and cons of renting or purchasing.