Paul, my splenectomy (open aka the big slice vs Laparoscopic) was nearly 10y ago and recovery was generally "normal" and 4 weeks later back to work with good counts. Because it was planned I had the 3 or 4 shots before surgery. I was warned about high fever (101) and need for immediate medical care but fortunately never had such a incident. I was faithful in temperature monitoring if I had a cold or anything. I didn't attempt any "special" vitamins, health foods or germ avoidance. I had multiple young grandchildren and germ isolation would have been futile

It took a few years before anxiety of infection or ITP recurrence faded into the background and life was good - but the thought of recurrence was never far away.
Unfortunately ITP recurrence did come back into my life almost 10y after splenectomy and I first attributed those little red spots as a rash, but within two weeks I knew it was ITP. ITP was confirmed by CBC and while still in very safe range, my historical CBC's showed a clear decline. Within a month I was back in the danger zone (teens) and still falling. Back on Pred which did not touch ITP (nor had it or multiple other RX 10y ago). Rituxan was the Rx that boosted my counts but it didn't kick in until week 9 (which by then my MD and I had decided it wasn't going to work).
Now the bad history - This recent episode and pred allowed Pneumocystis pneumonia to take hold (common for immune suppressed and one of the very aggressive pneumonia I was told). The high fever spikes (> 101 but only for a couple of hours) I monitored sent me back to MD and they eventually hospitalized after two return visits. Because it was detected relatively early it was controlled within several days. Unfortunately within 5 days I was hospitalized again with suspicion of septic shock. I felt much worse with this than the pneumonia - mental view wasn't very good when the MD called 911 to the office! Obviously that was controlled too. I mention all of this simply to impress the SIGNIFICANCE of temperature monitoring and early detection. The danger of sudden and overwhelming infection is real and demands quick treatment. Don't attempt to tough it out. But with diligent monitoring and quick reaction it can be controlled.
The experiences shared here are valuable and can help us come to "accept" and manage our condition. They also educate us and help remove the isolation through shared experiences. ITP can be overwhelming or we can grow old with caution, awareness and diligence - Yes it can still be hard, but it's also possible to have a reasonably safe and long life.
Praying you Keep the Faith and stay the course! Life doesn't end with a Dx of ITP, in fact I think in many ways it makes it more special and that's a good thing.