First time: some questions before installation

I just downloaded mobile joomla and before installation and use for the first time I have some questions: I have almost finished a website with a full screen, responsive template, it already shows pretty good on tablet and mobile but need some tweaking. Like the iframe image from google maps is too large and is showing outside the module position and there is some space beside the logo that is not showing on a normal screen but only on mobile. Also images I edited in JCE are not showing the way they should on tablet and mobile, they are a bit too large. Are these things that are easily solved by using mobile joomla or are that just css issues that I need to solve in another way?

I'd conside MobileJoomla as a tool that helps you to solve your issues, but it is not done automatically. MobileJoomla allows you:
- to rescale big image to fit mobile screen size and to reduce its size
- to disable certain modules/plugins in mobile version
- to set separate homepage for mobile devices
- with the aid of Mobile-Content plugin to display alternative content on mobile devices

Thank you, sounds like the solutions for my issues, i will install it!