I'll answer first what you say you're particularly interested in:
Note how different translators are choosing different wording to bring out what the word I'm speaking of as capacity means:
NET Philippians 2:13 for the one bringing forth in you both the desire and the effort– for the sake of his good pleasure– is God.
ESV Philippians 2:13 for it is God who works in you, both to will and to work for his good pleasure.
The word is energeō (which you should be able to carry over into English to get some range of meaning from). Here's a lexical definition:
Bauer-Danker, Greek-English Lexicon of the NT (BDAG)
[BDAG] ἐνεργέω (energeō)
1. intr. to put one’s capabilities into operation, work, be at work, be active, operate, be effective
2. trans. to bring someth. about through use of capability, work, produce, effect
Here Paul uses the same word and
shows again the interplay between his effort and God's in him
ESV Colossians 1:29 For this I toil, struggling with all his energy (energeia - same word in noun form) that he powerfully works (energeō) within me.
Ever-growing faith-obedience mindset is the growth to maturity and beyond. Paul covers the 'beyond' part in Phil3 referring to it as the pursuit of the high call of God in Christ Jesus. Faith-obedience is first internal, and it grows.
The commands are another whole topic. One of those commands is in Phil2:12 which ties to our growth in salvation.