Hi!
The answers in this thread are very clear and I am not sure if it can be explained clearer, still I try it.
1. "Autodesk has stopped activations for 2010 & older even if you install it you will not be able to activate it"
- Maya 7 is older, so you can't activate Maya 7 anymore. (Basically this is the only important information you need.)
2. Maya 7 is not supported on modern systems (OS and hardware).
Very likely it will not run on the system where you want to use it. (Do you have a very old computer with Windows XP and a supported GPU and driver?)
3. Even if you could install and activate Maya 7 on a modern system, what do you want to do with this Maya version?
The used technology is outdated and you can't make use of modern hardware like System RAM > 4GB (Maya 7 is 32-bit software).
So you can't use this Maya version for any commercial production as you will not be able to create the data required nowadays. (Maybe you could create some "low poly" models and export them as OBJ or something similar.)
My recommendation, check if you are eligible for a Maya Indie license and get a new Maya subscription, even if you are using it as hobbyist.