new to embroidery, how to??

I'm new to embroidery and looking to find out how to design letters, i just bought a brother pe 770. in particular I eat to know how to do vine, scripty letters together where the middle initial is bigger than the others. For example my nieces initials are M.E.H so I think the letters typically go MHE?? But my machine won't let me do more than one script letter at a time. I attached a pic of the example of what I need but of course the letters I need are different. If anyone can help me with this I appreciate it!

I am in the process of getting a Brother PE 770 to. Mine will come with a Laptop PC. Did you get a laptop with yours, and if it did, isn't there a program on it already?