Fail to send text message in iPhone?

So I was sending a text to the wrong person and I caught it just in time by turning off the cellular and Wi-Fi before it could go out all the way. Now it has the red exclamation and it says that sending the text failed. Will it be safe to switch back the cellular? Will it try to re-send the text automatically?

How to downgrade an app on my iphone?

I recently downloaded the kimoji app and i hate the new update on the animated emojis they are UGLY… So yea i don't like the new update and i really want to downgrade the app
can anybody tell me how to downgrade an app on my iphone?

ITunes is not letting me change song info?

I'd like to change the "a" to "A" but whenever I change it on iTunes in my computer and sync it with my iPhone it stays the same. This only happens for albums. If I change a letter in a song it will change but albums won't work. How do I fix this?

How to stop your messages being sent as iMessages?

I may be being really dumb right now but every time I send a text it turns it into an iMessage, which means if the person I send it to doesn't have internet then they won't get it right? I can't work out how to just send a normal text for people who don't have Wi-Fi or iMessage on their phone…

(I have an iPhone 6)

How to make my iPhone's lock screen to stay on LONGER?

I really like my lock screen background but I hate that it only stays on for 5 seconds!

Sometimes when I'm reading texts or emails it goes off and when I press the side button they're not there anymore and it's so annoying!

I have an iPhone 6s if it's of any help.