If you have not done DIY yet, even if you are used to working with chemicals, it can be very messy the first several times. It is generally recommended to use 48 mg or less while you are learning the ropes and getting your work habits together. Rubber gloves are a good thing, but not if they are so thick that they make you clumsy. Better for me is latex or nitrile medical exam gloves.
I am very experienced with chemicals, but I do not like to have an open bottle of 100 mg...knock it over and you have a real toxic mess on your hands...and carpet and maybe legs. I use amber glass bottles with eurodropper inserts from SpecialtyBottle.com:
Specialty Bottle - Amber European Dropper Bottles
Mine are 30-50 mL. The insert acts like a septum (the pierceable cap MFS has on their bottles) so the nic can be syringe-dispensed without any fear of spilling, and it does a good job of keeping air away from the liquid. No problem if I accidently knock the bottle over while the cap is off...something I have done more than once, and would have been a disaster without the insert. I use these for most of my DIY liquids, since for me syringes are the way to go for everything. I equally do not wish to knock over an open flavor bottle!
For long term storage, freezer is best. I prefer not to dilute mine down before freezing, since that will introduce a lot of O2, which is fairly soluble in water naturally). Better if the diluent is just VG or PG, but I only make VG juices. I prefer to make enough for a few weeks fresh, vape it up, and then make more. Keeps everything fresher, and I don't vape just one concentration. I make what I want when I want it, and my tastes vary over time. But making a bunch at a nic level close to what you vape is not a bad idea at all, and for a new DIYer, a more once-and-done approach might be a better way to go.
Be careful, be calm and focused, ask lots of questions, and have fun making your own juices!