J&J Booster
https://www.yalemedicine.org/news/johnson-and-johnson-covid-booster
https://www.cnet.com/health/johnson-and-johnson-covid-booster-omicron-variant/
You might want to consider a mix and match approach.
https://abcnews.go.com/US/jj-vaccine-doses-start-fauci/story?id=80620642
But, Dr. Fauci, the panel was also looking at new data that suggest J&J recipients may be better off getting a booster shot from the more effective Pfizer or Moderna vaccine. Is that a better solution?" Raddatz asked.
That is true, the data you refer to, that if you boost people who have originally received J&J with either Moderna or Pfizer, the level of antibodies that you induce in them is much higher than if you boost them with the original J&J, Fauci said.
https://www.cnbc.com/2021/10/13/jj-covid-vaccine-recipients-are-better-off-getting-pfizer-or-moderna-booster-nih-study-suggests.html
All the combinations boosted antibody levels higher, though Pfizers and Modernas boosters appeared to work best. People who received a booster dose of either the Moderna or Pfizer vaccines had a higher increase in their antibody responses more often than those who received an extra dose of J&J, according to the study.
The study showed recipients of Moderna or Pfizers original vaccines could easily swap third doses; the results were about the same. Volunteers who originally received the J&J vaccine appear to have gotten a better immune response if they got a booster made by Pfizer or Moderna. [snip]
J&Js one-dose vaccine uses an adenovirus, while Pfizers and Modernas two-dose vaccines use mRNA technology. The thought by scientists is that by mixing and matching vaccines that use different platforms, people may be able to get broader protection against the coronavirus and its new variants.
Good luck with whatever you decide.