I am making my son's 5th birthday cake next weekend. This will be my 3rd time making fondant. My fondant doesn't seem very sturdy. It seems soft yet easily cracks. Am I doing something wrong?

I am making a 2 tiered cake. My son has requested a "War Eagle" cake. For the bottom tier, I am planning to do orange buttercream with navy blue tiger stripes. For the second tier, I am planning white buttercream with an Auburn logo and some simple blue and orange polka dots. I am really nervous about making the zebra stripes and the Auburn logo considering my issues with soft, cracking fondant. I have already made a template/stencil for my logo but was planning to free hand my tiger stripes. Any tips, advise or feedback on that would help. This will be my first zebra/tiger print experience.

Thanks in advance!!!!

If it is too soft and doesnt have enough powdered sugar it will crack. Soft does not equal good necessarily. Its kind of like when my husband is fixing a pipe in our house and he says "tights tight, too tights broken" Soft is soft but too softs cracking.