Sentences for this situation

Hi:

For instance, I don't have a fixed time of waking up in the morning Every day. In what other words could we describe this situation, please? Can we say one of these?

1. There's no general time of me waking up in the morning.

2. I don't always wake up at a fixed time. Sometimes I wake up early, sometimes late.

Please suggest me if you have better sentences. Thank you!