Where to go now?

I just finished 12 weeks of MV SSB , with 36 weeks to go before my full IM race . Due to weather I cant ride outside (4 plus hrs.) so don’t really want to start the full 28 week plan yet , and the plan builder has those long rides also . Iwas thinking of 8 weeks of LVbuild , which would give me room for a few runs .No way could I run and swim with mv build plan , (I am 65) . Looking for some advice , and your ideas . thanks .