Welcome CataBina. Scripts are not actually necessary for modelling, they just simplify some things. For instance, you can model a spring manually, but it is a total pain, so a script exists that does it for you. I have not downloaded any scripts, preferring to do all my modelling myself (working out how to model something is half the fun IMO).
As already mentioned, check out the manual. For the first few weeks I used Anim8or I had both the program and the manual open, so I could flick from one to the other (which I did often!). There are a few minor gaps in the manual, but there are always people here on the forums ready to answer questions, especially on the trickier aspects of animation and modelling.
The advice I give to anyone who asks is "experiment". Anim8or's greatest strengths are its small size and simple interface, but there is still a lot of capability there. Visualise a scene, as simple or complex as you like, and try to build that scene in Anim8or. You may not get exactly what you imagined, but you will learn heaps by trying. For instance, you might want a rotating light, like that on a fire engine. In figuring out how to achieve this (using the manual) you will learn about light parameters, key frames, possibly even scripting. Try the tutorials on this site, and there are others on other, less Anim8or specific sites.
Have fun, that's what Anim8or is for!
