i have done a online course in java full stack dev. now, i am at the point where, i understand concepts or core & advance java spring framework boot and mvc with html/css. course was only 2 month so topics like spring security was not there but i am learning it. i have got a internship as java dev and i am learning from there also its a 6 month internship. so basically i have 6 months and i get alot of free time every day once i am done with internship task and weekend are also there. studying samething is little difficult because i think i know this and i hurry it up and it do get boring. my question is what will you suggest me should i do in 6 month time to develop to skills any new skills also from interview pov and to get good position at real job??? also how much time should i give to learning skills so i am not exhausted?????

i am trying to learn spring security and practicing what i already know and what internship task teach me other than that have no idea what to do other than that??? if possible you give a list of what i should focus on majorly??