A Grignard reaction was my first reaction. I had a pretty experienced chemist with me. It was demanding.
I can't suggest it for an unaccompanied first time chemist. Personally, I reserve such stuff for a well equipt Lab, with a good fume hood.
The Major concerns with this reaction, generally, are that diethylether the common Grignard solvent, both stinks and is wildly flammable, and that ethylene oxide shares the aforementioned qualities, additionally boiling at 10 Deg. C.. Even Ethyl Bromide can be a problem for the unwary.
The problems I see, are not in the reaction itself, but in safely handling the materials. Having run Grignards in non-ideal situations, I can tell you, even if all goes well, it is quite an experience. Arrrrggg Pheeewww.
Aside from personal toxicity, the concern is FLASHBACK. Meandering vapors, may be ignited by a distant source (pilot light, light switch, doorbell, cigarrette) and FLASHBACK to the reaction.......causing an explosion/fire. This is very bad, both legally and medically.
An experienced Bee, with preparation and good equiptment, in a well designed workspace, can handle such a reaction. It is a little complicated and hazardous for an unaccompanied first project.
If you have a Bee friend, or you can take a class, it will help you. As always, I recommend associating with that place....where they loan you millions of dollars worth of equiptment, pay for the reagents, and provide you quality personal instruction..........College.
Warmest Regards........................................zed
Of course, you may know all of this stuff already. If so, my apologies. Good luck in your endeavors.