Of course, an amplifier is essential to use an electric instrument. The more important point is to select an amplifier which will answer to all your needs. You need to determine in what conditions you will play: interior (at home) vs exterior (in a band, or alone in the street). If you would practice at home, a 20-30 watts amplifier will be great. Otherwise, it’s hard to advise you because many parameters are important: style of music, number of instruments in your band, needed sound power, etc.
The most important point is to respect frequencies of your electric violin. All amplifiers don’t matched. We didn’t recommend to use an electric guitar amp. They are not great for electric violinists. Bass amplifiers are better!