I am aware that Lord Lucifius Focalor is a god who has control over all the wealth of this world and I wonder if his ritual can be used to attract money? Or should I approach him before the ritual and ask for help in this direction, and then start doing the ritual regularly? Can you give me an idea?
I also usually use the Rituals of the Gods to ask them for help in specific affairs that they govern. For example, recently, as I said in one of my topics, to ask the Great Demon Furfur for help in managing a situation, I performed his Ritual because my need fell within the domain of Furfur and the affairs governed by him. After the ritual of his power, I focused on the Sigil with my humble request, trying to feel Furfur's energies well.
Personally I don't feel like recommending one God rather than another regarding which Ritual is best for money, because if you feel particularly attracted to a specific Deity, *and this Deity also governs the problem you want to apply yourself to*, then it's right that you follow this feeling of affinity of yours.
From experience, the power ritual of the God already puts you in contact with the Divinity in a very effective and blessed way, for me it was like this, but obviously nothing prevents you from performing an evocation ritual, especially if it is truly a serious problem, for then propose to work with the Divinity in question also through his Power Ritual. It can be useful.
OBVIOUSLY the things I advise you are the usual ones: don't "leave all the work to the Divinity", try on a material level to create situations where God can help you intervene. For example actively looking for a job or ways to earn money.