I would tell you to go to a local music store and see if you do a recording demo of four takes of the same vocal passage using four different mics. Everyboady prefers a different type of mic, so I can't tell you wich mic to get. However, like some people said, don't spending a ton of money for a mic just because of the brabd name. Although I'm not a singer, I use an NT2a by Rode and I like it a lot for it's multi patteren capsule. I haven't tried it on vocals yet, but it works well on mandolin and steel pan. Please note that certian types of mics require special attention. Condenser mics need phantom power, ribbion mic are very senstive to dropping, noise blown into the mic, and tube mic need a special power supply. Now, if you want to kill two bird with a pre amp and an interface, go with the UAD Apolo Twin, as it always you to plug-in setting directly to the audio at the same time, so you can use a preamp pulgin and get a nice tone out of your mic.

Computer: Macbook Pro, 16 inch 2021
DAWs: Pro Tools, Logic, and Maschine
plays drums, percussion, bass, steel pan, keyboard,
music producer/engineer