I'm looking for a GREP to go through a specific paragraph style and at the beginning of a paragraph bypass any digit or fraction (which are automatically created using the Open Type feature of my font - not sure if that's relevant) and also a list of specific words.

So for example if the paragraph is:

1 1/2 TBSP Cold water

I want the grep to bypass '1 1/2' as well as the also the word 'TBSP' in order to make the 'c' in Cold lowercase. I'd also want to filter out TSP at the same time and ideally target only the first letter found after 'digit/fraction TSP | TBSP' so that a phrase like '1 1/2 TSP light Chinese soy sauce' does not get effected as some lines already have the correct lower case formatting. The specific # of characters is not consistent throughout as some may be 1/2 TSP or 1 TBSP etc.

I feel like this is possible, but with my clumsy fumbling I haven't gotten it to work as I'm quite new to GREP.

TIA!