Does it suit you the mantra or the particular deity how to find out ?
step 1 - do the pannchopachar pooja of the deity whose mantra you want to read.
step 2 - do the same pannchopachar pooja with nayasa.
step 3 - include sankalpa.
[take care of direction and ask for forgiveness while doing pooja if u feel there is lot of disturbance during pooja.]
mostly there is a tradition of doing kavach first like shiva/narayan kavach before proceedings for any sadhana.
so there are many steps as such but foremost learn to make a Raksha kavach of the same god or the accompanying god, for example in Hanuman pooja ,ram and hanumaan kavach both works.In kaali pooja shiva and kali kavach both works.
If you just wanna test the step 1 is the litmus test and there are various such steps if you just wanna test without a guru, follow each step for at least 21/45 days to see if anything happens.
your question - i would say refrain if your are without a guru as माँ राजराजेश्वरी ललिता त्रिपुरसुंदरी is one of the ten Mahavidyas and there effect is quiet powerful even if the effect is good one it would be powerful and our body might not be able to handle it.
if looking for money - find puranic vidhi of reading shri sukta/or kuber mantra and hawana far safer then the "ten mahavidyas".
this might give you such reference - http://jyotish-tantra.blogspot.com/2015/02/ma-lalita-tripur-sundari-mantra.html