Bitcoin removed the built in miner long ago. You can mine with an external CPU miner, a GPU miner, or an ASIC miner
on your private blockchain. For BTC you need an ASIC.
The target difficulty will change depending on the rate blocks are found, but it takes a long time at low hash rate.
1 is probably the default starting difficulty and it hasn't retargeted yet. The 10 minute block time isn't really the issue,
it's how long it will take to find the number of blocks required before retargeting occurs. You could change the parameters
to better suit your mining power.
Thank you for the information. Yes the hash rate is low I agree.. Please correct me does it mean if a older version of bitcoin source code was used with cpu mining available the 10 min would have worked better ? To calculate with difficulty of 1 using a self made script could possibly be causing the limitation? I need to check this and try to get a miner . My laptop also has a build in GPU AMD Radeon (TM) Vega 6 Graphics but it is not being used much 1-2% but it is showing 61*C. I shut down the mining activity for a few days today I resumed and checked in total 850 coins in immature balance and on the main one 1850 coins. But it works. Thanks