Where should I put the dynamics in a Baroque piece?

Baroque music was dynamically totally predictable. Crescendo / decrescendo (gradual change in dynamics - as moving up/down with pitch ) was pretty much non-existent/ unheard of. You will much more likely find terraced or abrupt changes in dynamics caused by adding or subtracting entire sets of players or registers of an instrument

First time around - medium . Next time around -soft.... FINAL time around - LOUD. Almost always ending with LOUD. Normal --> Soft --> LOUD

Or take one central theme - first time around it's in a major key and medium volume. Next time around it's a minor key variation and soft.... final time we hear the theme everyone is all in - more embellishment, more volume, more instruments playing. Two viol de gambas - then one - then three. Two recorder flutes... then four... then six. Add a bank of pipes on the pipe organ... take a bank of pipes away.... add two banks to finish.

The instruments in general were not as loud as modern instruments - and one-dimensional. Volume was created with "more of the same". An extra register of strings (harpsichord).... another set of players in the section.... another bank of pipes (pipe organ)... another row of singers in the choir...

The music was much more mechanical/mathematical than the classical and romantic periods that followed. After all - the "Piano" is actually named a "Piano-Forte" - in English a "Soft-Loud". It was the first keyboard instrument that could play in modern dynamics

LIke everything in life , there are of course exceptions to the norm - the Bach 'Cello suites are played quite dynamically/expressively today - but whether or not that was true when they were written - who knows? We'll never know for sure.