I use ortho lith for continuous tone enlarged negatives, and have calibrated what works for me with my 20 year old frozen stash of this film from an old printers shop.
I find it has an EI of about 3-6 depending on if it is daylight or tungsten. This is not too far off of the enlarging paper that you have been using for 'film' in your pinhole camera to date.
, in terms of exposure time.
I home mix a developer that is about 1g of metol per litre in a weak alkali with a touch oif sulfiute to keep the metol alive to process this film. If you don't have the ability of custom mixed developers, I would recommend trying very dilute print developer as a starting developer; think 1:20 from the stock soution of dektol or evel higher if starting with something like Ilford Multigrade developer liquid concentrate to start. If contrast is too high with the dilute paper developers, then try a dilute film developer; perhaps d76 at 1:6 or more, as a guess to start.
To initially calibrate the film for developing times is easy, in that you can watch the level of development with a red safelight. I do go with time and temperature once I want to fine tune my process.
I would recommend that you try to start with this film in the darkroom, to make dups of negs under the enlarger. Treat this duping as a very low contrast subject situation. If you were shooting it in the camera most subjects will have more contrast than you find when duping a neg, so the developer time to a give a similar contrast index value neg will be shorter with in camera pinhole shots.
I hope this gives you some ideas to think on and then grow youir own process with.