There's a number of mandatory documents to secure.

I'd suggest you consider the timescales, location and the validity duration of each piece of evidential documentation.

The English Language test certificate usually has a validity of at least 2 years.
The TB certification is valid for 6 months and the pre-screening can only be done at the UKVI clinic in Manila

Income related and bank statements need to be up to date with the latest documents less than 28 days old

Our forum is one of the best resources around, do make best use of that by searching out the information needed.

As a first step in reviewing the forms and documentation take a look here at the Application for UK visa for family settlement: form VAF4A then ask any specific questions.

In connection with the Fiancée visa don't underestimate the need to support evidence of the relationship and intention to marry and live together on a permanent basis.

As self-employed you'd be well advised to carefully think through the specific Financial Requirements.
Remember that £18600 income threshold is gross taxable income not business income.