I was uncomfortable with glass at first too so I tried the small pink glass eggs for kegals, becoming comfortable with those I moved up to the larger glass eggs. Those felt even better so then I started experimenting with temperature play, using the Ultra Heat & Chill lubes. Yep, that was even better especially combined with silicone vibrating dildos.
Now that I've learned to enjoy and trust glass I've gotten the Bent Graduate. Keeping in mind it is glass and a non-forgiving material as well as advice here on the site and in reviews I experimented with it. For me this a great beginners glass dildo because it can be used two ways. One as a strait dildo and the second as a G-spot stimulator. The bulbs are rounded and not sharp so I have no fear of poking myself.
Just remember to take it easy when you first use it or any other glass toy of choice keeping in mind the material and the comfort of your body.