Dolibarr Customisation

I am new to Dolibarr and have very limited knowledge of programming. However, I have managed to change the positions of the layouts but need further work carry out to add additional fields in products and layouts. Products: create extra fields ABV (eg 5.00%), H/Litres per case (e.g 0.125), Case Size (e.g. 24x500ml). ABV and H/Litres are numeric boxes. ABV should include “%” when in PDF layout. Case size need to be dropbox. Can these be positioned within the products to my requirement? The following layouts need programming as follows: azur Change Item description to item label not full description Include ABV, case size, H/Litre calculation (qty x product h/litre) enstein Change Item description to item label not full description Include ABV, case size, H/Litre calculation (qty x product h/litre) crabe Change Item description to item label not full description Include ABV, case size, H/Litre calculation (qty x product h/litre) Rouget keep full descrition. Include ABV, case size, H/Litre calculation (qty x product h/litre) Muscadet Change Item description to item label not full description Include ABV, case size, H/Litre calculation (qty x product h/litre) The above must also be displayed on the relevant cards for example when entering proposal product abv, case size must be visible along with existing fields (price etc). In addition: Customer “Shipping Address” adding to Stock Offer, Shipping, Goods Out, etc. Date format on all documents be changed to dd/mm/yyyy. Create layout for stock list to include serial batch number and to filter out stock levels such as zero stocks.