i give lessons on string instruments. If in case you will love to learn more about Violin, the  smallest and highest-pitched instrument in the family in regular use.
I haven't ever played the violin but played the saxophone.  Is it at all similar?
Not at all. saxophone  is a family of woodwind instruments
what is the violin like?  guitars?
Yes guitar where as unlike guitar , The violin typically has four strings tuned in perfect fifths