Any tips??

I'm really into alt styles but I literally CANNOT dress the way I want since my parents are religious and strict _(._.)_

⏤͟͟͞͞✧ Plus, basically anyone near me is religious or find alt ugly,  so it's hard to ask them. I'd try to go to charity/thrifts but my mum would rather me go to other shops like primark/h&m or something, they have  the most blandest clothes.... (I cant go to the mall alone since its a little far and I'd probably never be allowed until college). 

Any skulls/horns,basically anything remotely edgy is a big no-no, also any revealing clothing. Is there anything I can do? And I don't really want to support fast fashion brands like shein since that's kinda against the whole thing about being alt. 

Another thing: DIY is pretty hard for me aswell, I do have a bit of sewing materials but I'm not sure if my parents would even get me any. 

Do you guys have any tips on to have a more alt fit that won't be trashed out by your parents?? (^o^)