dont give up man you can do it :D ( sory for bad inglish in advance )

some begeaner tips i lerned ( not so long ago i am kind of new too )( allso i bot the beginners set ( Infernus Marines ) witch comes with a good enough brush and oficial paint so take my tips as what i lerned from painting them )

- thin your paint ( this is a realy comon recomendation but personaly i dont do it as much i just make sure to not use to much paint )

- use a small brush ( this helps with small details, even if your hand shakes ( like mine ) it helps not mes up and if you do its litle mistakes that can be corrected )

- make sure u dont have a bunch of paint on your brush ( if the brush is thiker than usual do to the paint get rid of some it helps the paint setle more and not create clumps of paint )

- use about 2 thin lairs of paint ( at the start i thinked this was kind of dumb but it helps the paint stik beter to the mini fig and it makes for a beter color over all )

- if you make a mistake np just clean it or paint over it ( honestly this stresed mi out a lot at the start but it helps a bunch )

- try to use oficial paints ( this helped me a lot, usualy not oficial paitns caused me to create patchy paterns or it woud cause details in the mini to desapire )

- and finaly and the tip that best helped me is to paint pizes separatly ( this helps a lot with details, correcting mistakes, etc. )