When you trust Christ as Savior, you then have the Holy Spirit within you, even if you asked Jesus into your
heart just now.  
I Thessalonians 4:8 "God gives us the Holy Spirit".  Many Christians never allow themselves a
deep relationship with the Holy Spirit their entire earthly lives, which is a shame because the reality is that
although they're still saved they never get to enjoy the real power and intimacy available to them with all
three: God, Jesus, and the Holy Spirit.  It's called being “baptized in the spirit”, and is often referred to as
“speaking in tongues” because that is the most basic outward sign of what has happened within a person.  
Jude 20 "pray in the Holy Spirit".  These tongues, once called utterances, first came about in an upper room
prayer meeting, referred to as Pentecost.  
Acts 2:4 "they were all filled with the Holy Ghost and began
speaking in tongues as the Holy Spirit gave them utterance".

There's no waiting period to receive this gift once you have accepted Christ.  Every Christian is supposed to
be baptized in the Spirit.  Many get it instantly, while others don't realize that it belongs to them for a long time
because many churches deceive their congregations into thinking that it was something for a long time ago
and isn’t applicable today.  Thank God that’s very wrong.  Becoming baptized in the Spirit is nothing new,
not a thing of the past, and not just for certain people.  
Acts 8:15 "Peter and John prayed for them that they
might receive the Holy Spirit".  Anyone using any of the above excuses is doing just that - using excuses.  
You have your Heavenly language inside of you if you know Jesus, the language you will have when you are
in Heaven, and there's no reason why you can't let it out.  God wants you to.

The advantages are endless.  In your prayer life you will be calling down a new power from Heaven and into
your life as it was meant to be.  An alert wisdom and holy discernment will belong to you through a more
intimate connection with the Holy Spirit.  
Acts 1:8 "when the Holy Spirit has come on you, you will receive
power".  The apostle Paul said in
I Corinthians 14:18: "I thank God I speak in tongues".

It's not hard, so do not over think it.  Simply ask God to loosen your tongue as you pray.  Allow yourself to let
go and let the Holy Spirit take over your praying until you receive your new prayer language.  At first it may
seem like babbling of some sort to you, but you'll quickly be able to discern when the Holy Spirit is using your
tongue to speak in the language you will be using for all eternity.  The Holy Spirit will guide you as it
Luke 12:12 "for the Holy Spirit will teach you"

Don't get discouraged if it doesn't happen instantaneously.  Keep seeking it, God will bless everyone
belonging to Christ with their Heavenly language if they desire it.  God does not withhold any good thing from
us.  It took me a couple of weeks to receive my Heavenly language.  It took a friend of mine a couple of
minutes.  I know someone else for whom it took a couple of months.

Some people receive a second gift of publicly speaking in tongues, being used in that particular way as a
vessel of God.  Another variation of the gift is publicly being able to interpret another person who is speaking
in tongues.  This happens in an assembly of Christians usually within a worship service, but has little to do
with all Christians having their own private prayer language whereby the Holy Spirit uses their tongues
for a more intimate relationship with God.    

Again, be not dissuaded.  All Christians should have their own prayer language, the language they will be
speaking throughout all eternity.  The gift of tongues is for you to have at the asking.  In your prayer time ask
the Holy Spirit to loosen and use your tongue.  Don't give up until it happens, even if it takes many tries
over a period of time.  
Acts 4:31 "they were all filled with the Holy Spirit and spoke boldly".  

When you receive your Heavenly language, thank God for blessing you in this way.  
You will never be the same.