Goddess Lakshmi is supposed as the Goddess of Wealth in our scriptures.
You are feeling me quite confused my dear friend!
Do not get confused between Lord Kubera and Goddess Lakshmi.
Both are related to wealth and both are completely different.
Lord Kubera is just like a manager whereas She is the deity of the wealth.
There are many examples in our scriptures where people who worship Goddess Lakshmi got every wish of theirs fulfilled.
Although Goddess is not very easy to please but once you please her, she makes all your dreams come true.
Before starting the practice, invite the Lakshmi Devi by reciting this Mantra-
ॐ अम्बे अम्बिके अम्बालिके नमानयति कश्चन ।
ससत्स्यकश्चकः सुभद्रिकां काम्पीलवासिनीं ।।
हेमद्रितनायां देवीं वरदां शङ्करप्रियां ।
लम्बोदरस्य जननीं गौरीं आवाह्याम्यहम् ।।
ambe ambike ambalike namanayati kaschan
sa satsya kaschakah subhadrikaam kampiilvasinim
hemadri tanayam devim vardaam Shankar priy
lambodarasya jannim gauriim aawahayamyaham
You need to choose one of these Mantras. These Mantras are effective in same way but their conditions are different. So choose the one which suits you best-
Recite any of these Mantras one hundred and eight times. You can do it in multiple of that too.
Always have faith and reverence in your mind while doing this practice or after the practice is complete. Offer her goods which are offered generally. Try to offer her sweets of yellow color.
Now it is the time when you should pay respect to the Mother Lakshmi for accepting your worship. Pay your respect by reciting this Mantra-
त्वाम् वैष्णवी शक्तिरनन्तवीर्यः
विश्वस्य वीजं परिमासि माया
संमोहितं देवी समस्तमेतद
त्वम् वै प्रसन्ना भुवि मुक्ति हेतु
twam vashnavi shaktiranant viryah
vishwasya vijam parimasi maya
sammohitam devi samastmetad
twam vai prasanna bhuvi mukti hetu
O Mother Lakshmi you are the vaishnawi shakti having infinite power. You are the seed of the world’s origin and you are the maya (illusion) who is distracting people. Everybody is pleased with you. Please be happy and give me blessings.
The things you should keep in mind while chanting Lakshmi Mantra
I hope that this practice will open the doors of many new successes for you my friends!
All the very best for your spiritual journey