Everyone's experience with recovery is different. There are some commonalities though:
1. The catheter is uncomfortable but temporary. Many feel this is the worst part of the recovery.
2. The pain level after surgery is minimal. I only took Tylenol for pain. I slept in a recliner for a few days, mostly because of the catheter but also back pain/discomfort. I couldn't get comfortable in bed with it. Many people also get some back pain when trying to lie down in bed.
3. You will find that you get tired easily for the first few weeks. However, you will also find that after the cath comes out you will rapidly want to become active. Many of us started walking as much as possible two days after the surgery. The more active you are, the better the recovery. However, don't lift heavy objects (over 8 pounds my doc said) for a few weeks. Let your incisions (inside and outside) heal.
4. Don't rush it. It is a major surgery. Give yourself some time to heal. Be patient with yourself.
5. It is a completely different form of recovery from a biopsy. A biopsy is minimally invasive. The RARP is a major surgery.