Best "conditioner" for a new leather jacket is...nothing.
This is what the folks at Aero Leather recommend for their new jackets.
Your jacket does not need...nor want... a "conditioner" at this stage.
Many "conditioners" contain silicone..which basically stays with the jacket forever..rubbing off on other surfaces....producting an "unnatural" feel to the leather.
Many soak the leather to the point where it becomes heavy.
After a year or so...if the leather seems a bit dry... stick with what museums use to care for their old leather items....Pecard's.
A very light dressing. Applied...let it sit awhile, then remove the excess.
Re; the color...
wear it out in a the rain a few times. Let it dry naturally..away from a heat source. The color will naturally change.
Yes..,,you can get it died..but that will wear off. I'd say if you want a seal brown leather jacket sell this one and order one with that color.