Hi Pio,
almost everything is possible, but it depends on your Joomla, SPPB and CSS skills.
And time (dead line), if you need that quite fast, maybe extra J! expert hand may be needed.
In general, chosen template is OK but am not sure if perfect. Yes, many basic customization can be done via SPPB addon settings, but for some details for sure you need extra Custom CSS lines or even extra component.
For example there is form "SCRIVICI SENZA IMPEGNO" that has option to upload file, and our addon cannot do that yet :/