The first thing to consider for a newcomer to electronics is how many channels and what voltage current levels are necessary. As all of us at one time were newcomers "been there done that" and quickly found out for general purpose work dual channels is a must, at minimum +-20V at 1A.
We also found out that all switching PSs make additional noise above a linear type, some are so bad as almost useless for anything other that driving a motor!! Altho some recent quality switching PS are not too bad and could be useful for even some analog type work.
The additional cost one finds in a quality lab/bench type PS like the mentioned Rigol (and others) is they are linear types, use of torrid type transformers (low magnetic field leakage), multiple independent channels, very low output noise levels, utilize precision DACs and ADCs so the outputs are spot on (both voltage and current), don't have turn ON or OFF overshoot/undershoot (disastrous for sensitive semiconductors), behave nicely when engaging Over Current or Voltage limits, easy to read digital displays (some have/allow much larger fonts) and have multiple means to remotely communicate.
All these features cost in design time, assembly, components (and customer service) and this is reflected in the end user cost.
Since most of us have "been there done that", a wise newcomer would learn from others and select a PS that's linear and has a couple outputs capable of producing clean accurate voltages and currents, maybe +-20V and 1A from a reputable OEM source (or used).
One thing a newcomer may not recognize, but will quickly learn (usually the hard way!!), everything in electronics starts with the Power Supply, wether a Battery, Mains PS or Solar Source, and a cheap, noisy, inaccurate PS soon finds its way to the trash. This is especially true as one gains knowledge in electronics and becomes "seasoned"
Best,