What are some good tools to learn different instruments in high school?

I want to write music as a hobby or maybe occupation. However, with limited time to even practice my own trumpet, I can't find the time to play something else as well. What would be a good way to learn other keys and and instruments without having to do hands on stuff? (I'm in high school so this is on my free time. Breaks, summer, ect.)

I'm a pianist of nine years and a guitarist/bassist of four. Recently I've become interested in synthesizers and the like. I know about things such as sustain, reverb, tremolo, etc from my guitar and keyboard, but some of the things I've come across while just using synthesizer software is beyond me.

Vocoder, attack, decay, bandpass filters, all of that. It's completely lost on me. Ignore the fact that I know what reverb and whatnot are pretty much, because I have no idea what the "dampness" of reverb even is.

B is the question and 1-7 are the guidelines.

B. Describe how the Renaissance became a turning point in European society and thought.

1. Explain how the end of the Crusades impacted the economics of Europe.

2. How did economics change the way many Europeans looked at religion and politics.

3. What conflicts came out of the attempts to reform religious practices?

4. List the major figures and the role they played in the Protestant Reformation.

5. How did the Renaissance and Protestant lead to the creation of nation-states?

6. Explain how the Enlightenment was a reaction to the rise of absolute monarchies.

7. Define nationalism and explain how it can lead to conflict with religious and political authorities

Is there a name for it? If so what is it called?

So I play violin a lot and sometimes play pizzicato ( plucking the string with my finger instead of bowing) and when I do play pizzicato I get little bumps on my finger where I don't have feeling and it stays that way for a while till it heals... I'm sorry if I'm not being to descriptive it's just hard to explain... Anyways is there a name for this? Have you had it before? Basically anything can help...

What is the triple faced mask called?

Has a laughing face, an angry face and a sad face all together sharing eyes. I don't know what it is called or where it came from but it is interesting.