When you go into the church, you can bless yourself with holy water, and its usual for us to genuflect on the right knee, (the knee to the floor, or nearly) in reverence to the true Presence of Jesus.
Whether you kneel or sit in a quiet church by yourself is up to you.
Depending on the type of kneeler, whether padded or not, you might become more aware of hurting knees than praying.
You are likely to receive different answers, and need to discern what is right for you.
I kneel for a little while, and then sit if Iām spending a longer with the Lord.
I sit near the Tabernacle, (because Iād not be sitting at the back of the room, Iād want to be near him, so for me thatās the honest thing to do. I only can be me, just as you can only be you.
I talk to Jesus as if we were in the same place together, which we are. If Iām absolutely sure Iām alone, I even sometimes sing a few meaningful hymns.
Otherwise I talk to Him in my mind/heart as I would if I could see Him and we are sitting at at table together (as He did with His Mother, His apostles, His friends, like Mary and Martha, and Lazarus.)
When I ask his assistance for family, friends, the world, the Church, me, I do so in that way.
Basically if you prefer to say the Rosary, or any formal and meditative prayer, thatās great. Your relationship with God is yours, uniquely and preciously.
I donāt usually talk to anyone about it, in answer to your question. Iām only saying it now because youāre asking,
and I know others will have perspective that may be more appropriate for you regarding praying in a quiet church by yourself.
(A joke by GK Chesterton comes to mind. Iāll share it in a minute.)
I cant say what you should be feeling, or what to take away.
Talking and being with One who loves us so much, and whom we loveā¦yes, itās a good feeling, youāve being with loved family, and our Savior. I feel peaceful, and thankful.
Bottom line, I pray in the way with the reverence and love that suits my nature, but doesnāt cross anyoneās boundaries if no one else is present to disturb.
What experience to take out of it? Not looking for any really. Itās enough to have spent time in His presence.
Chestertonās joke.
A man on a London bus became aware that Chesterton was praying quietly from a prayerbook whilst traveling, The man announced loudly to him in censure, āWhen I pray, I go quietly into my room and pray to the Father without displaying my piety to anyone.ā
Chesterton, who had a mischievous sense of humor, replied,
āAnd then you get on the top of a London bus and tell the world about it!ā
Yeah well I just did.
however Iām sure youāll get some great responses, I just thought this might conceivably help you, because who knows what kind of prayerfulness will be right for you.