Can't get resources on minecraft pocket edition?

I'm very new to the game, read that I need to get cobblestone to build the oven thingy but when I break the cobblestone it's not showing up any little icons to collect? Is this because I'm breaking it with my fist and not tools or what?

Minecraft PE changed to Minecraft PC?

Ok here s the deal,

I was building my house and I thought that my sheep should have a play mate. So I decided to try and change survival to creative just for a bit so I can spawn my other sheep. Anyway I did some commands (/gamemode c, /gamemode1, and /gamemode 0) anyway none of them worked so i thought oh well doesn't matter. I got out of mine craft and did some other stuff. I got back in no later than a minute after I exited and the game has changed to PC version. The food bar is there, potions, ect. I have no mods or apps. So how do I get back my original game. What commands do I use?

Ever since the latest minecraft pe update, I can't join any servers?

Okay so I updated minecraft pe because i just realized there was one available. So when I updated, it worked well. But I can't join servers? Why can't I join any minecraft pe servers? What is going on? On each server on google it says they have updated too so why can't I join?

Can I test this game somehow before I buy it?

I want to buy Minecraft pocket edition for my device. I have the money in cash, and I'll have to buy a google play card to use it. The thing is, the app says it's compatible with my phone, but the last time I bought a game for my phone that said it was compatible, I tried as hard as I could to make it work, but it just kept opening a black screen for a full minute and force closing. And when I gave up on it, it was already too late to get my money back from google play. I've run the mcpe demo on my device before, and it ran quite well, but I'm not sure if that would indicate that the newer version would work. Is there a way I could test it before I go get a card to buy it, or would buying it be the only way?

How to fix my tablet from restarting upon opening certain apps?

One month ago, I got a tablet. Some weeks ago I noticed it restarted upon opening some apps. These include: Geometry Dash, PacMan 256, Hill Climb Racing, Minecraft PE, Trippy Wheels, etc. I tried googling the problem and even looking on YouTube, but I didn't find what I was looking form, so I decided to ask here.

No me funciona en minecraft pe el multijugador?

Intento que mi hermana entre a mi mundo y no le sale en su celular que al menos existe._. De igual manera con mis amigos y si tengo internet, estan cerca mio en la misma red, tengo el multijugador encendido pero no me deja uwu alguna solucion al problema?