Help needed on Tomato growing, composting and nutrients | Vegetable gardening | GEEKGARDENER

1) First help is on growing tomatoes - these are my favorites as they dont need too much TLC.  Issue is due to reasons not clear to me - my tomato plants are growing very fast and few of them are growing like bushes - with branches shooting out from the main stem as low as 1 inch from the soil level - is it okay for them to grow like a bush in different directions or do I trim it to one main stem and 1-2 main branches to get higher levels or productivity?

2) Second advice needed is on composting - I have tried composting by getting leaves and other  organic matter  - but this is a boring, dirty slow process.  So please let me know if its ok if I directly dump organic waste into the pots and let them rot there..not sure if such rotting brings its own set of problems to the pots

3) Nutrients - I would like GG to create a nutrient chart just like the sowing chart and keep it as a standard link on top of the website - we have various varieties and organic compost is easy to understand, buy and use.  However there are several types of chemical nutrients in various ratios like 17-17-17 and 19-19-19 etc....even those are available for direct to use (30bucks a kilo) to spray kind (150 bucks a kilo) plus you have urea (15 bucks a kilo in KR market)....etc - so a nice detailed article on various kinds, how and when to use, where and what to buy..etc would be a great help

4) Lastly - pesticides - I have tried neem oil + hongime oil with soap - is not 100% successful all the time. Last weekend I bought carebdozium or somesuch fungicide plus some pesticide with chlorophyriphos and they seem to work better..although  I did this as a last resort..hence an article on all such pesticides/insecticides/fungicides....etc would also be of great help.

Its better all such information including one on pests and insects is available as standard link on top of the website like the sowing chart rather than answers in forums where its hard to find.