My Journey so far into the world of Cryptocurrency

As of today I have been mining for 5 days. Using a computer with very low end specs. A laptop g71gx just something I have around. link to pc specs. This is my first foray into mining!

I started with Minergate GUI miner. Minergate link. photo of GUI at bottom
It works well to learn what is going on but decided I needed to know more. I also needed to get it running on a real computer now that I have a wallet set up and a pool to use. I started mining QCN due to its low difficulty and the computer I was using has very low specs(it gets 30 H/s on the cpu) and the GPU is only compute 1.X so isn't supported by most mining software anymore.
I downloaded some old versions of the mining software off github and got it to work with roughly equal hash speed of the cpu (30h/s). It would disconnect frequently, and was blazing hot. I am unware of the actual temp. It had to of been over 90 degrees Celsius. Needless to say I am no longer using my gpu to mine on that computer.

Over the past 2 days I have set up my computer to mine while I am not using it! It is a AIO Asus specs with a 960m and i7 in it.

^^That is it running^^ It seems to run a bit warm I have the miner set to cut off at 85 degrees.

I figured the next logical step was to learn to use the CLI version off the miners I went thru alot of trial and error with software and hardware issue. But as you see above i figured it out.
Downloaded miners for AMD cards and wondered why they didn't work. lol
Using versions that don't support compute 1.x for a long time till i figured out what it was.
I read about 10 READMEs' about 100 time.

I have done lots of reading and research for the past 5 days.
Now that I feel like maybe I might have some knowledge about how the cryptocurrency works, how it is mined, and how coin exchanges work. I really want to dive full in.

I have some questions for the veterans here on Steemit Questions are in bold

What is the next step?
Mining rig? Build a nice PC for mining and use it sometimes?
What is better AMD or Nvidia?
Everything I have read says AMD (all my cards are nvidia)
Is it ok to buy a used mining rig?
I found a 3 card set up for sale locally only used for 3 months. $1500 3x AMD rx470 (they are sold out everywhere)
What pool should I use?
I currently have been using minergate but would like to look outside the cryptonight algorithim.
What should I do with my mined coins? Exchange? Save?
Turn to STEEM,SBD? Everyone says put it in a coin you believe in, Steem then? Maybe ETH or BTC?

Thanks for readiing

^^My friend told my my speed for ETH was terrible and to stop should I of listened?^^ I did....
In the photo above I believe i was just using the GPU(960m)& 4 cores of my CPU for eth. It would give me a low memory error when using my gpu for eth. Think it has to do with the DAG file size. Not sure tho.

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