Generally speaking, I believe prayer is conversation and there is no right and wrong. Tell God what's on your heart. Looking at the Palms are some beautiful examples of raw prayer. But I know when you're out of practice, it can be hard to start praying again. Just like it's hard to talk to someone who has become a stranger or you never were good speaking with strangers. So using the Lord's prayer or other prayers (most letters in the NT start and/or finish with prayers) as a guide isn't a bad place to go to
"break the ice" and getting comfortable again with prayer.
Also it's okay if your prayers are awkward or forced, what's important is that you're making an effort because eventually it gets less and less difficult
Matthew 6:9-13
Pray like this:
Our Father in heaven,
may your name be kept holy.
May your Kingdom come soon.
May your will be done on earth,
as it is in heaven.
Give us today the food we need,
and forgive us our sins,
as we have forgiven those who sin against us.
And dont let us yield to temptation,
but rescue us from the evil one.
You don't have to pray the Lord's prayer word-for-word. What's important is the contents. There are many dissections of this prayer but I'm going give you a simple crude version.
The prayer starts off by setting a proper context: a way to view prayer and life. Our close relationship to the Lord as a father, His holiness, His Kingdom, and His will.
You can start off your prayers by acknowledging His beauty, His mercy, His holiness, His grace, His glory, His power, His love. This is praise and thanksgiving
for His character versus His stuff. Then acknowledge and ask for His Kingdom, as what we're called to seek first. Praying for His will, is accepting and allowing His authority over our lives.
After the stage has been set, the prayer then addresses our physical and spiritual needs. Forgiveness for ourselves and others. Then help and rescues from temptation and Satan.
...
If it helps at all... Lately I pray like this: Praise, His Will, Repentance, Request. This is just a crude guide and it's not as mechanical as it sounds, but it helps me keep perspective and gives me a focus (instead of not praying at all).
I start with praise and gratitude. I focus on God, I thank Him for Him, His attributes, etc, and acknowledge His work through Christ and in my personal life. Then I ask for His will to be done, not mine. I use that as the lenses for which I make any request. With His "big picture in mind", I tell Him what's on my heart, the troubles I see, and for the help, forgiveness, wisdom, grace, etc that I and/or someone else needs.