What would you do?

Instead of doing it yourself, when you do not have design experience, hire a professional and get it done.

I'm not repairing my car, when it's broken. I do not have the experience, even that I am quite good at such things with computers.

Shows us some pictures!!

Make sure that you use Adobe Illustrator to create the logo.... NOT PHOTOSHOP.

If you are using letters choose a bold font.
Col Gray has some awsome videos on Logo design on YouTube. Watch them.  He is amazing actually had him a speaker for the Digital Career Institute!!!! Brilliant brand designer.

Intellectual property laws protect designers/artists work. You can't take someone else's design/artwork and use it commercially without their written permission.  However, you can use the artwork as an inspiration piece for a similar design.  But your logo must be totally original.

For the various outputs required (business cards, web, t-shirts, etc...), you need a high quality vector graphic exported to SVG from Illustrator.  Vectors can be rescaled to any size without loss in quality.  Ordinary JPG or PNG images can't do that. 

If this is over your head, do yourself a favor and hire a graphic designer.  Without training & experience, anything you produce will likely look amateurish and/or be unacceptable for professional print purposes.  A good graphic designer can produce a logo for you in a day or two.  Your logo is the first impression customers have of your company.  So it's money well-spent.

I echo what @J E L said, and would like to add that if you're not a professional graphic designer, it might be a good idea to sketch out what you want to achieve and then hire a professional to execute it. There are pitfalls and design rules etc  you might not be aware of until it's too late, and I think you'll be glad you did. In addition to the factors I just mentioned, it's important to repeat what Jain said: there is  steep learning curve to Illustrator. It can take years to get really good at this stuff, and one day you look back on your early efforts and cringe.  (Never mind how I know this.)

-edit typo

Hi @iamrobinson It's a little difficult to know exactly what you are attempting to do without seeing the image you are starting with. But generally speaking, one of the very best Adobe tools for creating vector text to use as fonts or in logos is Illustrator. There is a somewhat steep learning curve with it if you are unfamiliar with drawing software. With your subscription, you have access to all of Adobe's fonts for the rest of your text. But you could trace, outline, and expand the top of the cross to make it into the letter "T" and so on. Hope that's helpful!