Front panel door is magnetic and it opens to the right side if you pull it.
Once you have opened it, reach below the front I/O panel and you should feel small gap between case and front I/O panel. Put your fingers in and pull. May take some muscle to do it but most mid tower ATX case front I/O panels are removed that way. Removal of the front I/O panel is very similar to a top I/O panel removal.