17 days in WA?

Hello, I will be alone in Perth from August 25 until September 11. I have done some research and Perth-Exmouth seems to be quite a popular road trip with amazing stops. Only issue is that I have never done such a long road trip by myself. In case, would it be “difficult”? What is the experience of other solo travellers?
Alternatively, I was thinking to just book day tours (or multi day where necessary) to visit different locations from Perth (e.g. Kalbarri National Park, Pinnacle desert, Hutt Lagoon) and fly to Exmouth to then visit Ningaloo Reef. But would I “miss out” a lot?
Any experience of other solo travellers would be greatly appreciated!