Switching circuit using PIC and MIC5841

Hi everyone!

This is a first time build for me, for a project that basically delivers smells using ceramic resistors as heaters and fans for flow.

There are 20 heaters and 19 fans in total.

I have tried to build a schematic in multisim but have run into a major problem (please see attachment for jpg and multisim file):

I have been told that using a PIC10 alone will not be sufficient to switch on the MIC's due to its lack of inputs but can be compatible with in circuit programming.
I have been recommended to use a PIC12 to have a dedicated program pins

Can someone suggest me an appropriate PIC12 and the way to wire it all up with the CA-42 and MIC's?
Few other things:
1. Are the pin configurations correct?
2. Unsure on which connections to use from the USB - serial Cable (CA-42)
[I think the Sin and Txd are wrong] can someone explain which pins do what.
3. Do i leave serial out pin on the last MIC?

Design is based on:
**broken link removed**

CA 42 : **broken link removed**

PIC10F200: MICROCHIP|PIC10F200-I/P|8BIT FLASH MCU, 10F200, DIP8 | Farnell United Kingdom

MIC5841YW: https://uk.farnell.com/micrel/mic5841ywm/latch-driver-8bit-ser-in-18soic/dp/1663128?Ntt=mic5841

Thanks for any help

I forgot to mention that the circuit will be required to either turn on and off a maximum of about 3 resistors and 4 fans at one time