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what kind of process is this? how can i see just from these graphs what kind of process this is? AR? MA? ARMA? ARIMA? showing time-series and correlograms, how to tell what kind of process this is?

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None of the peaks in the ACF or the PACF plot reach significance (apart, of course, from the very first peak in the ACF plot, which is always equal to $1$, because it is the autocorrelation of a time series with itself). This strongly suggests a simple white noise process, or ARIMA(0,0,0) if you want to be fancy.

Consider using a modern automatic ARIMA model selection algorithm, rather than trying to read ACF/PACF plots.

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