Let’s see if I can help with your questions!
- Can someone guide me on how to ensure the texts stays on the same line - example: #OTBUnboxChallenge all on on line, instead of the “ge” carrying to the next line?
- Try going to your Theme customizer > Theme settings (will be a gear icon on the left side) > Typography and try adjusting the header text font scale slider - it should look like this:
2. Can someone please provide general feedback on my store design?
I tried accessing outside-the-box-collections.com and it didn’t appear as a valid webpage yet - so judging based on your screenshot is a bit tricky! It looks good and I would just recommend from a basic POV to ensure you deliver the message of what the site does as soon as the page loads (using the top content from the homepage) as well as ensuring you have buy/add to cart buttons as high up on the page as you can.
There’s also a few considerations for your SEO, the user experience etc. that I’d be happy to check for you as well.
I have some service options that are available if you were wanting a more personalized optimization of your site - send me a message if you wanted!
3. Can someone assist me with uploading a custom font and using it in my theme?
Sure - so if your font is a Google font, I found this article that shares exactly how to install a font into your theme with screenshots if you wanted to give it a go.
I also found this free app here that looks like an easy way to install fonts without the coding steps - you might just need the font file to pop into the app and voila!
Once you install the app, you have to assign the font to the body or header text on your theme from the Typography section of the Theme settings. 
4. Can someone assist me with changing the text color on the text with images section to any color other than black?
So for this one, it’s important to understand that each section of your theme is connected to a “Scheme” (which is basically a defined set of colors). This means that first, you need to click on the top level of the section that you’re trying to adjust to find out what Scheme is assigned to it.
I would then recommend going to your Theme customizer > Theme settings (click the gear icon again on the left) > Colors and editing the Text color in the Scheme that you saw associated with the section you were editing.
If you needed help getting those things done, don’t hesitate to reach out since we do offer some options - otherwise, good luck and happy selling!