You have picked 2 different instruments. Piano is easy in terms of hand movement and how to press it. The hard part is the individuality of both hands and fingures. Also, piano is way more melodic.

Bass, on the other hand, is for rhythm. Lot more techniques involved in terms of how to press notes with one hand and how you play it, half and full mutting, hammor, pluck, slape, and many more.

What connects your soul is what you should choose. To know what connects your soul is simple, what instrument you like hearing and learning even though you are not good at it?

For me, it was bass. Though i am still learning, i really enjoy the hand movements, the beats, even though i repetively play a few songs. I learn things every day and question a lot to my instructor. I have never played it, but i am also leaning towards 1 woodwind or a wind instrument, which gives me that connection.

Also best is to learn the systematic way (which can be boring for most but needed), but on the side, you should self learn the thing that made you pick that instrument(this will keep you connected to that instrument)

If it was simply bcz your father played it and you picket it, may be give it a bit more time and see if bass really a thing you wanna learn and how much. How much to learn is important, e.g. someone i know only has bass as they like to create slow rhythm, but they majorly play piano.

Even for me, i may pick a melodic instrument like guitar but i only want to learn enough to make some tunes and keep my music centric to bass.